diff --git a/ResSimpy/FileOperations/file_operations.py b/ResSimpy/FileOperations/file_operations.py
index 925be245..08df0edd 100644
--- a/ResSimpy/FileOperations/file_operations.py
+++ b/ResSimpy/FileOperations/file_operations.py
@@ -804,14 +804,20 @@ def split_file_as_list_by_date(file_as_list: list[str], date_token: str = 'TIME'
         of that token.
     """
     split_file: dict[str, list[str]] = {}
-    current_token_value = None
+    date_token_value = None
+    no_token_dict_key = f'BEFORE_FIRST_{date_token}'
+
     for i, line in enumerate(file_as_list):
         if check_token(date_token, line, comment_characters=comment_characters):
             # TODO handle 3 part dates in this bit
-            current_token_value = get_expected_token_value(token=date_token, token_line=line,
-                                                           file_list=file_as_list[i:],
-                                                           comment_characters=comment_characters)
-            split_file[current_token_value] = [line]
-        elif current_token_value is not None:
-            split_file[current_token_value].append(line)
+            date_token_value = get_expected_token_value(token=date_token, token_line=line,
+                                                        file_list=file_as_list[i:],
+                                                        comment_characters=comment_characters)
+            split_file[date_token_value] = [line]
+        elif date_token_value is None:
+            if no_token_dict_key not in split_file:
+                split_file[no_token_dict_key] = []
+            split_file[no_token_dict_key].append(line)
+        elif date_token_value is not None:
+            split_file[date_token_value].append(line)
     return split_file
diff --git a/ResSimpy/Nexus/DataModels/Network/NexusProc.py b/ResSimpy/Nexus/DataModels/Network/NexusProc.py
index db82eb63..24fae6e1 100644
--- a/ResSimpy/Nexus/DataModels/Network/NexusProc.py
+++ b/ResSimpy/Nexus/DataModels/Network/NexusProc.py
@@ -1,6 +1,11 @@
 from dataclasses import dataclass
-from typing import Optional, Mapping
+from typing import Optional
+
+from ResSimpy.DataModelBaseClasses.NetworkObject import NetworkObject
+from ResSimpy.Enums.UnitsEnum import UnitSystem
+from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.NexusKeywords.proc_keywords import PREDEFINED_VARS, CONDITIONAL_KEYWORDS, NEXUS_ALL_PROC_FUNCS
+from ResSimpy.Units.AttributeMappings.BaseUnitMapping import BaseUnitMapping
 
 
 # set custom error message
@@ -9,18 +14,15 @@ class SetError(Exception):
 
 
 @dataclass(kw_only=True, repr=True)
-class NexusProc:
+class NexusProc(NetworkObject):
     """Class that represents a single nexus procedure."""
-    __date: Optional[str]
-    __name: Optional[str]
     __priority: Optional[int]
     __contents: Optional[list[str]]
     __contents_breakdown: dict[str, int]
 
-    def __init__(self, date: Optional[str] = None,
-                 contents: Optional[list[str]] = None,
-                 name: Optional[str] = None,
-                 priority: Optional[int] = None) -> None:
+    def __init__(self, date: Optional[str] = None, contents: Optional[list[str]] = None,
+                 name: Optional[str] = None, priority: Optional[int] = None, unit_system: Optional[UnitSystem] = None,
+                 start_date: Optional[str] = None, date_format: Optional[DateFormat] = None) -> None:
         """Initialize the attributes of the class.
 
         Attributes:
@@ -33,33 +35,23 @@ def __init__(self, date: Optional[str] = None,
         Methods:
                 reset_nexus_proc_function_counts(): Returns a dictionary of zero counts for the nexus proc functions.
         """
-
-        self.__date = date
-        self.__name = name
         self.__priority = priority
         self.__contents = contents
+
         self.__contents_breakdown = self.reset_nexus_proc_function_counts()
+        super().__init__(properties_dict={}, date=date, date_format=date_format, start_date=start_date,
+                         unit_system=unit_system, name=name)
 
     @property
     def contents(self) -> Optional[list[str]]:
         """Returns the contents of the main body of the procedure."""
         return self.__contents
 
-    @property
-    def date(self) -> Optional[str]:
-        """Returns the date that the procedure occurred."""
-        return self.__date
-
     @property
     def priority(self) -> Optional[int]:
         """Returns the priority of the procedure."""
         return self.__priority
 
-    @property
-    def name(self) -> Optional[str]:
-        """Returns the name of the procedure."""
-        return self.__name
-
     @property
     def contents_breakdown(self) -> dict[str, int]:
         """Returns the dictionary counts of the proc functions."""
@@ -76,9 +68,9 @@ def contents_breakdown(self, value: dict) -> None:
                            'Nexus Keyword Manual page 1013.')
 
     @staticmethod
-    def get_keyword_mapping() -> Mapping[str, tuple[str, type]]:
+    def get_keyword_mapping() -> dict[str, tuple[str, type]]:
         """Gets the mapping of nexus keywords to attribute definitions."""
-        keywords = {
+        keywords: dict[str, tuple[str, type]] = {
             'NAME': ('name', str),
             'PRIORITY': ('priority', str)
         }
@@ -99,3 +91,21 @@ def reset_nexus_proc_function_counts() -> dict[str, int]:
         to_search = predef_vars | cond | all_proc_funcs
 
         return to_search
+
+    def to_string(self) -> str:
+        """Outputs the procedure as a string in the format it would be written in a Nexus file."""
+        output_str = "PROCS"
+        if self.name is not None:
+            output_str += f" NAME {self.name}"
+        if self.priority is not None:
+            output_str += f" PRIORITY {self.priority}"
+        output_str += '\n'
+        if self.contents is not None:
+            output_str += '\n'.join(self.contents) + '\n'
+        output_str += "ENDPROCS\n"
+        return output_str
+
+    @property
+    def units(self) -> BaseUnitMapping:
+        """Returns the attribute to unit map for the data object."""
+        return BaseUnitMapping(None)
diff --git a/ResSimpy/Nexus/DataModels/Network/NexusProcs.py b/ResSimpy/Nexus/DataModels/Network/NexusProcs.py
index c71c2e84..9dc1a02f 100644
--- a/ResSimpy/Nexus/DataModels/Network/NexusProcs.py
+++ b/ResSimpy/Nexus/DataModels/Network/NexusProcs.py
@@ -4,6 +4,7 @@
 from typing import Sequence, TYPE_CHECKING
 
 from ResSimpy.Nexus.DataModels.Network.NexusProc import NexusProc
+from ResSimpy.Time.ISODateTime import ISODateTime
 
 if TYPE_CHECKING:
     from ResSimpy.Nexus.NexusNetwork import NexusNetwork
@@ -35,3 +36,11 @@ def get_all(self) -> Sequence[NexusProc]:
     def _add_to_memory(self, procs_to_add: list[NexusProc]) -> None:
         """Adds the list of Nexus procedure objects to memory."""
         self.__procs.extend(procs_to_add)
+
+    def to_string_for_date(self, date: ISODateTime) -> str:
+        """Outputs the procedures for a specific date."""
+        output_str = ''
+        procs_for_date = [x for x in self.__procs if x.iso_date == date]
+        for proc in procs_for_date:
+            output_str += proc.to_string()
+        return output_str
diff --git a/ResSimpy/Nexus/DataModels/NexusWellList.py b/ResSimpy/Nexus/DataModels/Network/NexusWellList.py
similarity index 100%
rename from ResSimpy/Nexus/DataModels/NexusWellList.py
rename to ResSimpy/Nexus/DataModels/Network/NexusWellList.py
diff --git a/ResSimpy/Nexus/DataModels/Network/NexusWellLists.py b/ResSimpy/Nexus/DataModels/Network/NexusWellLists.py
index 31a178e9..8c33dade 100644
--- a/ResSimpy/Nexus/DataModels/Network/NexusWellLists.py
+++ b/ResSimpy/Nexus/DataModels/Network/NexusWellLists.py
@@ -6,7 +6,7 @@
 
 from ResSimpy.DataModelBaseClasses.NetworkList import NetworkList
 from ResSimpy.GenericContainerClasses.NetworkLists import NetworkLists
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 
 if TYPE_CHECKING:
     from ResSimpy.Nexus.NexusNetwork import NexusNetwork
diff --git a/ResSimpy/Nexus/NexusNetwork.py b/ResSimpy/Nexus/NexusNetwork.py
index 19257a77..ea8a3bd0 100644
--- a/ResSimpy/Nexus/NexusNetwork.py
+++ b/ResSimpy/Nexus/NexusNetwork.py
@@ -48,7 +48,7 @@
 from ResSimpy.Nexus.DataModels.Network.NexusWellhead import NexusWellhead
 from ResSimpy.Nexus.DataModels.Network.NexusWellheads import NexusWellheads
 from ResSimpy.Nexus.DataModels.NexusFile import NexusFile
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.ActivationChangeEnum import ActivationChangeEnum
 from ResSimpy.Nexus.nexus_collect_tables import collect_all_tables_to_objects
 
@@ -163,9 +163,8 @@ def __load_procs(self) -> list[NexusProc]:
             time = self.__model.start_date
             name_ = None
             priority_ = None
-            # initialize an empty proc object, so we can use its staticmethod reset_nexus_proc_function_counts
-            proc_obj = NexusProc()
-            nexus_proc_function_counts = proc_obj.reset_nexus_proc_function_counts()
+            nexus_proc_function_counts = NexusProc.reset_nexus_proc_function_counts()
+            date_format = self.__model.date_format
 
             for line in file_contents:
 
@@ -176,7 +175,8 @@ def __load_procs(self) -> list[NexusProc]:
                 # check for keyword ENDPROCS to signal end of the procedure
                 if fo.check_token('ENDPROCS', line=line):
                     # create the proc object
-                    proc_obj = NexusProc(contents=proc_contents, date=time, name=name_, priority=priority_)
+                    proc_obj = NexusProc(contents=proc_contents, date=time, name=name_, priority=priority_,
+                                         date_format=date_format, start_date=self.__model.start_date)
 
                     # set the proc function counts
                     proc_obj.contents_breakdown = nexus_proc_function_counts
diff --git a/ResSimpy/Nexus/nexus_collect_tables.py b/ResSimpy/Nexus/nexus_collect_tables.py
index b7e51d82..2e2ea58c 100644
--- a/ResSimpy/Nexus/nexus_collect_tables.py
+++ b/ResSimpy/Nexus/nexus_collect_tables.py
@@ -14,7 +14,7 @@
 from ResSimpy.Nexus.DataModels.Network.NexusNodeLists import NexusNodeLists
 from ResSimpy.Nexus.DataModels.Network.NexusConstraint import NexusConstraint
 from ResSimpy.Nexus.DataModels.Network.NexusWellLists import NexusWellLists
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.ActivationChangeEnum import ActivationChangeEnum
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.nexus_constraint_operations import load_inline_constraints
diff --git a/ResSimpy/Nexus/nexus_constraint_operations.py b/ResSimpy/Nexus/nexus_constraint_operations.py
index 26d1eb56..a16ba520 100644
--- a/ResSimpy/Nexus/nexus_constraint_operations.py
+++ b/ResSimpy/Nexus/nexus_constraint_operations.py
@@ -7,7 +7,7 @@
 from ResSimpy.DataModelBaseClasses.DataObjectMixin import DataObjectMixinDictType
 from ResSimpy.Nexus.DataModels.Network.NexusConstraint import NexusConstraint
 from ResSimpy.Enums.UnitsEnum import UnitSystem
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.nexus_file_operations import get_next_value, correct_datatypes
 from ResSimpy.Utils.invert_nexus_map import nexus_keyword_to_attribute_name
diff --git a/ResSimpy/Nexus/nexus_file_operations.py b/ResSimpy/Nexus/nexus_file_operations.py
index 78ff8c07..7afb95c7 100644
--- a/ResSimpy/Nexus/nexus_file_operations.py
+++ b/ResSimpy/Nexus/nexus_file_operations.py
@@ -16,7 +16,7 @@
     strip_file_of_comments, load_file_as_list
 from ResSimpy.Nexus.DataModels.Network.NexusNodeConnection import NexusNodeConnection
 from ResSimpy.Nexus.DataModels.Network.NexusWellConnection import NexusWellConnection
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.NexusKeywords.nexus_keywords import VALID_NEXUS_KEYWORDS
 from ResSimpy.Nexus.NexusKeywords.structured_grid_keywords import GRID_ARRAY_KEYWORDS
diff --git a/ResSimpy/Nexus/nexus_model_file_generator.py b/ResSimpy/Nexus/nexus_model_file_generator.py
index 5f294d75..144f47e2 100644
--- a/ResSimpy/Nexus/nexus_model_file_generator.py
+++ b/ResSimpy/Nexus/nexus_model_file_generator.py
@@ -48,6 +48,7 @@ def output_surface_section(self) -> str:
         if self.model.network is None:
             return full_schedule
         all_well_connections = self.model.network.well_connections.get_all()
+        all_wellheads = self.model.network.wellheads.get_all()
         all_targets = self.model.network.targets.get_all()
         all_welllists = self.model.network.welllists.get_all()
         all_conlists = self.model.network.conlists.get_all()
@@ -55,9 +56,10 @@ def output_surface_section(self) -> str:
         all_nodes = self.model.network.nodes.get_all()
         all_connections = self.model.network.connections.get_all()
         all_activations = self.model.network.activation_changes.get_all()
+        all_procs = self.model.network.procs.get_all()
 
-        network_objects = [all_well_connections, all_targets, all_welllists, all_nodes, all_connections,
-                           all_activations, all_conlists, all_nodelists]
+        network_objects = [all_well_connections, all_wellheads, all_targets, all_welllists, all_nodes, all_connections,
+                           all_activations, all_conlists, all_nodelists, all_procs]
 
         all_constraints = self.model.network.constraints.get_all()
 
@@ -77,7 +79,7 @@ def output_surface_section(self) -> str:
         # Write out all events for each date
         for date in ordered_all_event_dates:
             if date != self.model.start_iso_date:
-                full_schedule += f"TIME {date.strftime_dateformat(self.model.date_format)}\n"
+                full_schedule += f"TIME {date.strftime_dateformat(self.model.date_format)}\n\n"
 
             well_connections_for_date = [x for x in all_well_connections if x.iso_date == date]
 
@@ -85,6 +87,11 @@ def output_surface_section(self) -> str:
                 full_schedule += self.model.network.well_connections.to_string_for_date(date=date)
                 full_schedule += '\n'
 
+            wellheads_for_date = [x for x in all_wellheads if x.iso_date == date]
+            if any(wellheads_for_date) and self.model.network.wellheads is not None:
+                full_schedule += self.model.network.wellheads.to_string_for_date(date=date)
+                full_schedule += '\n'
+
             welllists_for_date = [x for x in all_welllists if x.iso_date == date]
             if any(welllists_for_date) and self.model.network.welllists is not None:
                 full_schedule += self.model.network.welllists.to_string_for_date(date=date)
@@ -123,6 +130,11 @@ def output_surface_section(self) -> str:
                 full_schedule += self.model.network.activation_changes.to_string_for_date(date=date)
                 full_schedule += '\n'
 
+            procs_for_date = [x for x in all_procs if x.iso_date == date]
+            if any(procs_for_date) and self.model.network.procs is not None:
+                full_schedule += self.model.network.procs.to_string_for_date(date=date)
+                full_schedule += '\n'
+
         return full_schedule
 
     def output_wells_section(self) -> str:
diff --git a/tests/FileOperations/test_file_operations.py b/tests/FileOperations/test_file_operations.py
index 429cee3d..994036db 100644
--- a/tests/FileOperations/test_file_operations.py
+++ b/tests/FileOperations/test_file_operations.py
@@ -262,9 +262,11 @@ def test_get_full_file_path(mocker, origin, rootdir, is_nexus, expected_full_pat
 
 def test_split_file_as_list_by_date():
     # Arrange
-    file_as_list = ['TIME 01/01/2020\n', 'OTHERLINE\n', 'TIME 01/02/2020\n', 'OTHERLINE2\n',
+    file_as_list = ['Some content before the token card\n', 'another line\n', 'TIME 01/01/2020\n', 'OTHERLINE\n', 
+                    'TIME 01/02/2020\n', 'OTHERLINE2\n',
                     'TIME 01/03/2020\n', 'TIME 01/04/2020\n', '! TIME 01/05/2021\n', 'OTHERLINE3\n', 'Otherline4\n']
     expected_result = {
+        'BEFORE_FIRST_TIME': ['Some content before the token card\n', 'another line\n'],
         '01/01/2020': ['TIME 01/01/2020\n', 'OTHERLINE\n'],
         '01/02/2020': ['TIME 01/02/2020\n', 'OTHERLINE2\n'],
         '01/03/2020': ['TIME 01/03/2020\n'],
diff --git a/tests/Nexus/nexus_simulator/test_nexus_conlist.py b/tests/Nexus/nexus_simulator/test_nexus_conlist.py
index 7907cd75..31877ca8 100644
--- a/tests/Nexus/nexus_simulator/test_nexus_conlist.py
+++ b/tests/Nexus/nexus_simulator/test_nexus_conlist.py
@@ -3,7 +3,7 @@
 from ResSimpy.Enums.UnitsEnum import UnitSystem
 from ResSimpy.Nexus.DataModels.Network.NexusConList import NexusConList
 from ResSimpy.Nexus.DataModels.NexusFile import NexusFile
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.nexus_collect_tables import collect_all_tables_to_objects
 from ResSimpy.Nexus.nexus_load_list_table import load_table_to_lists
diff --git a/tests/Nexus/nexus_simulator/test_nexus_network.py b/tests/Nexus/nexus_simulator/test_nexus_network.py
index c47f9d85..44ae3f43 100644
--- a/tests/Nexus/nexus_simulator/test_nexus_network.py
+++ b/tests/Nexus/nexus_simulator/test_nexus_network.py
@@ -12,7 +12,7 @@
 from ResSimpy.Nexus.DataModels.Network.NexusTarget import NexusTarget
 from ResSimpy.Nexus.DataModels.Network.NexusTargets import NexusTargets
 from ResSimpy.Nexus.DataModels.Network.NexusWellLists import NexusWellLists
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusNetwork import NexusNetwork
 from ResSimpy.Enums.WellTypeEnum import WellType
 from ResSimpy.Nexus.DataModels.Network.NexusActivationChange import NexusActivationChange
@@ -1424,18 +1424,20 @@ def test_load_between_procs(mocker):
     	cp01_gaslift    GAS       CP01          GASLIFT     NONE        NA ! Checked NODECON 13/05/2020 
     	ENDNODECON
     	'''
+    start_date = '01/01/2023'
     expected_nodecons = [NexusNodeConnection(name='CP01', node_in='CP01', node_out='wh_cp01', con_type='PIPE',
                                              hyd_method='2', delta_depth=7002.67, date='01/01/2023',
                                              unit_system=UnitSystem.ENGLISH, properties_dict={},
-                                             date_format=DateFormat.DD_MM_YYYY, start_date='01/01/2023'),
+                                             date_format=DateFormat.DD_MM_YYYY, start_date=start_date),
                          NexusNodeConnection(name='cp01_gaslift', node_in='GAS', node_out='CP01', con_type='GASLIFT',
                                              hyd_method=None, delta_depth=None, date='01/01/2023',
                                              unit_system=UnitSystem.ENGLISH, properties_dict={},
-                                             date_format=DateFormat.DD_MM_YYYY, start_date='01/01/2023')]
+                                             date_format=DateFormat.DD_MM_YYYY, start_date=start_date)]
 
     expected_proc = NexusProc(date='01/01/2023', name='TUNING',
                               contents=['REAL_1D     list\n', 'REAL  t_last = 0\n', 'IF (t_last == 0 THEN\n',
-                                        't_last = TIME\n', 'ENDIF\n'], )
+                                        't_last = TIME\n', 'ENDIF\n'], date_format=DateFormat.DD_MM_YYYY, 
+                              start_date=start_date)
 
     def mock_open_wrapper(filename, mode):
         mock_open = mock_multiple_files(mocker, filename, potential_file_dict={
@@ -1445,7 +1447,6 @@ def mock_open_wrapper(filename, mode):
         }).return_value
         return mock_open
 
-    start_date = '01/01/2023'
     mocker.patch("builtins.open", mock_open_wrapper)
 
     fcs_file_path = 'fcs_file.fcs'
diff --git a/tests/Nexus/nexus_simulator/test_nexus_network_procedures.py b/tests/Nexus/nexus_simulator/test_nexus_network_procedures.py
index 02fd4614..7201c656 100644
--- a/tests/Nexus/nexus_simulator/test_nexus_network_procedures.py
+++ b/tests/Nexus/nexus_simulator/test_nexus_network_procedures.py
@@ -1,8 +1,14 @@
+from datetime import datetime
+
+import pytest
+
 from ResSimpy.Nexus.DataModels.Network.NexusNode import NexusNode
 from ResSimpy.Nexus.DataModels.Network.NexusProc import NexusProc
 from ResSimpy.Nexus.DataModels.Network.NexusProcs import NexusProcs
 from ResSimpy.Nexus.DataModels.NexusFile import NexusFile
+from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.NexusNetwork import NexusNetwork
+from ResSimpy.Time.ISODateTime import ISODateTime
 from tests.utility_for_tests import get_fake_nexus_simulator
 
 
@@ -22,7 +28,8 @@ def test_load_nexus_procedures_basic(mocker):
 
     # create object
     # date must be the same as the start_date
-    expected_proc = NexusProc(date='01/01/2023', contents=["THIS IS TEXT"])
+    expected_proc = NexusProc(date='01/01/2023', contents=["THIS IS TEXT"], date_format=DateFormat.MM_DD_YYYY,
+                              start_date=start_date)
 
     # create a nexus network object
     dummy_model = get_fake_nexus_simulator(mocker)
@@ -38,7 +45,6 @@ def test_load_nexus_procedures_basic(mocker):
     nexus_net.procs = nexus_procs
 
     # Act
-    # nexus_procs.load(surface_file, start_date, default_units=UnitSystem.ENGLISH)
     result = nexus_procs.get_all()
 
     # Assert
@@ -64,7 +70,8 @@ def test_load_nexus_procedures_date(mocker):
 
     # create object
     # date must be the same as the start_date
-    expected_proc = NexusProc(date='01/01/2024', contents=["THIS IS TEXT"])
+    expected_proc = NexusProc(date='01/01/2024', contents=["THIS IS TEXT"], date_format=DateFormat.MM_DD_YYYY,
+                              start_date=start_date)
 
     # create a nexus network object
     dummy_model = get_fake_nexus_simulator(mocker)
@@ -106,7 +113,8 @@ def test_load_nexus_procedures_name_priority(mocker):
 
     # create object
     # date must be the same as the start_date
-    expected_proc = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"])
+    expected_proc = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                              date_format=DateFormat.MM_DD_YYYY, start_date=start_date)
 
     # create a nexus network object
     dummy_model = get_fake_nexus_simulator(mocker)
@@ -151,9 +159,10 @@ def test_load_nexus_procedures_multiple_procs_one_time(mocker):
 
     # create object
     # date must be the same as the start_date
-    expected_proc1 = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"])
+    expected_proc1 = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                               date_format=DateFormat.MM_DD_YYYY, start_date=start_date)
     expected_proc2 = NexusProc(date='01/01/2024', name='DYNAMIC_VARS', priority=2,
-                               contents=["THIS IS MORE TEXT"])
+                               contents=["THIS IS MORE TEXT"], date_format=DateFormat.MM_DD_YYYY, start_date=start_date)
 
     # create a nexus network object
     dummy_model = get_fake_nexus_simulator(mocker)
@@ -197,15 +206,18 @@ def test_load_nexus_procedures_same_proc_multiple_time(mocker):
     """
 
     surface_file = NexusFile(location='surface.dat', file_content_as_list=surface_file_contents.splitlines())
-
+    date_format = DateFormat.DD_MM_YYYY
     # create object
     # date must be the same as the start_date
-    expected_proc1 = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"])
-    expected_proc2 = NexusProc(date='01/01/2025', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"])
+    expected_proc1 = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                               date_format=date_format, start_date=start_date)
+    expected_proc2 = NexusProc(date='01/01/2025', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                               date_format=date_format, start_date=start_date)
 
     # create a nexus network object
     dummy_model = get_fake_nexus_simulator(mocker)
     dummy_model._start_date = start_date
+    dummy_model.date_format = date_format
     dummy_model.model_files.surface_files = {1: surface_file}
 
     nexus_net = NexusNetwork(model=dummy_model)
@@ -251,10 +263,13 @@ def test_load_nexus_procedures_multiple_procs_multiple_times(mocker):
 
     # create object
     # date must be the same as the start_date
-    expected_proc1 = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"])
-    expected_proc2 = NexusProc(date='01/01/2025', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"])
+    expected_proc1 = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                               date_format=DateFormat.MM_DD_YYYY, start_date=start_date)
+    expected_proc2 = NexusProc(date='01/01/2025', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                               date_format=DateFormat.MM_DD_YYYY, start_date=start_date)
     expected_proc3 = NexusProc(date='01/01/2025', name='DYNAMIC_VARS', priority=2,
-                               contents=["THIS IS DIFFERENT TEXT"])
+                               contents=["THIS IS DIFFERENT TEXT"], date_format=DateFormat.MM_DD_YYYY, 
+                               start_date=start_date)
 
     # create a nexus network object
     dummy_model = get_fake_nexus_simulator(mocker)
@@ -506,3 +521,37 @@ def test_load_nexus_procedures_proc_func_counts_single_letter_no_spaces_do_loop(
     assert result[0].contents_breakdown['P'] == 1
     assert result[0].contents_breakdown['DO'] == 1
 
+@pytest.mark.parametrize('date_to_output, expected_result', [
+    (ISODateTime(2024, 1, 1), """PROCS NAME STATIC_VARS PRIORITY 1
+IF(ABS(MAX(X)) > ABS(MAX(Y))) THEN
+PRINTOUT(2)!PRINTOUT is a built in nexus proc function
+ENDIF
+ENDPROCS
+"""),
+    (ISODateTime(2025, 1, 1), """PROCS NAME STATIC_VARS PRIORITY 1
+THIS IS TEXT
+ENDPROCS
+PROCS NAME DYNAMIC_VARS PRIORITY 2
+THIS IS DIFFERENT TEXT
+ENDPROCS
+""")])
+def test_proc_to_string_for_date(date_to_output: ISODateTime, expected_result: str):
+    # Arrange
+    dateformat = DateFormat.DD_MM_YYYY
+    proc1 = NexusProc(date='01/01/2024', name='STATIC_VARS', priority=1, contents=['IF(ABS(MAX(X)) > ABS(MAX(Y))) THEN',
+                                  'PRINTOUT(2)!PRINTOUT is a built in nexus proc function',
+                                  'ENDIF'],
+                      date_format=dateformat)
+    proc2 = NexusProc(date='01/01/2025', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                      date_format=dateformat)
+    proc3 = NexusProc(date='01/01/2025', name='DYNAMIC_VARS', priority=2,
+                      contents=["THIS IS DIFFERENT TEXT"], date_format=dateformat)
+
+    procs_object = NexusProcs(parent_network=None)
+    procs_object._add_to_memory([proc1, proc2, proc3])
+    
+    # Act
+    result = procs_object.to_string_for_date(date_to_output)
+    
+    # Assert
+    assert result == expected_result
diff --git a/tests/Nexus/nexus_simulator/test_nexus_nodelist.py b/tests/Nexus/nexus_simulator/test_nexus_nodelist.py
index e03fdf7c..2393f196 100644
--- a/tests/Nexus/nexus_simulator/test_nexus_nodelist.py
+++ b/tests/Nexus/nexus_simulator/test_nexus_nodelist.py
@@ -4,7 +4,7 @@
 from ResSimpy.Nexus.DataModels.Network.NexusConList import NexusConList
 from ResSimpy.Nexus.DataModels.Network.NexusNodeList import NexusNodeList
 from ResSimpy.Nexus.DataModels.NexusFile import NexusFile
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.nexus_collect_tables import collect_all_tables_to_objects
 from ResSimpy.Nexus.nexus_load_list_table import load_table_to_lists
diff --git a/tests/Nexus/nexus_simulator/test_nexus_simulator.py b/tests/Nexus/nexus_simulator/test_nexus_simulator.py
index 8d786532..d01a9fe7 100644
--- a/tests/Nexus/nexus_simulator/test_nexus_simulator.py
+++ b/tests/Nexus/nexus_simulator/test_nexus_simulator.py
@@ -31,13 +31,13 @@
 from ResSimpy.Nexus.DataModels.NexusGasliftMethod import NexusGasliftMethod
 from ResSimpy.Nexus.DataModels.Network.NexusNode import NexusNode
 from ResSimpy.Nexus.DataModels.Network.NexusNodeConnection import NexusNodeConnection
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.DataModels.StructuredGrid.NexusGrid import NexusGrid
 from ResSimpy.Nexus.NexusNetwork import NexusNetwork
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.NexusIPRMethods import NexusIprMethods
 from ResSimpy.Nexus.DataModels.NexusIPRMethod import NexusIprMethod
-from pytest_mock import MockerFixture, mocker
+from pytest_mock import MockerFixture
 from unittest.mock import Mock
 from ResSimpy.Enums.UnitsEnum import UnitSystem
 from ResSimpy.Nexus.NexusWells import NexusWells
diff --git a/tests/Nexus/test_load_wells.py b/tests/Nexus/test_load_wells.py
index 56cc4e8f..d9816dc3 100644
--- a/tests/Nexus/test_load_wells.py
+++ b/tests/Nexus/test_load_wells.py
@@ -1,5 +1,3 @@
-import warnings
-
 import pytest
 from pytest_mock import MockerFixture
 
diff --git a/tests/Nexus/test_nexus_welllist.py b/tests/Nexus/test_nexus_welllist.py
index c929f8e1..0b5eb573 100644
--- a/tests/Nexus/test_nexus_welllist.py
+++ b/tests/Nexus/test_nexus_welllist.py
@@ -4,7 +4,7 @@
 from ResSimpy.Enums.UnitsEnum import UnitSystem
 from ResSimpy.Nexus.DataModels.Network.NexusWellLists import NexusWellLists
 from ResSimpy.Nexus.DataModels.NexusFile import NexusFile
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.NexusNetwork import NexusNetwork
 from ResSimpy.Nexus.nexus_collect_tables import collect_all_tables_to_objects
diff --git a/tests/Nexus/writing_tests/test_nexus_write_schedule.py b/tests/Nexus/writing_tests/test_nexus_write_schedule.py
index 1342ef0a..b31e8412 100644
--- a/tests/Nexus/writing_tests/test_nexus_write_schedule.py
+++ b/tests/Nexus/writing_tests/test_nexus_write_schedule.py
@@ -9,13 +9,15 @@
 from ResSimpy.Nexus.DataModels.Network.NexusNode import NexusNode
 from ResSimpy.Nexus.DataModels.Network.NexusNodeConnection import NexusNodeConnection
 from ResSimpy.Nexus.DataModels.Network.NexusNodeList import NexusNodeList
+from ResSimpy.Nexus.DataModels.Network.NexusProc import NexusProc
 from ResSimpy.Nexus.DataModels.Network.NexusTarget import NexusTarget
 from ResSimpy.Nexus.DataModels.Network.NexusWellConnection import NexusWellConnection
-from ResSimpy.Nexus.DataModels.NexusWellList import NexusWellList
+from ResSimpy.Nexus.DataModels.Network.NexusWellhead import NexusWellhead
+from ResSimpy.Nexus.DataModels.Network.NexusWellList import NexusWellList
 from ResSimpy.Nexus.NexusEnums.ActivationChangeEnum import ActivationChangeEnum
 from ResSimpy.Nexus.NexusEnums.DateFormatEnum import DateFormat
 from ResSimpy.Nexus.nexus_model_file_generator import NexusModelFileGenerator
-from tests.utility_for_tests import get_fake_nexus_simulator
+
 
 @pytest.mark.parametrize('pvt_type, eos_details, expected_pvt_string', [
     (PvtType.BLACKOIL, None, 'BLACKOIL'),
@@ -45,6 +47,12 @@ def test_write_surface_section(pvt_type, eos_details, expected_pvt_string):
                                                       date='01/01/2020', unit_system=UnitSystem.METRIC,
                                                       date_format=DateFormat.DD_MM_YYYY, start_date=start_date)
     model.network.well_connections._add_to_memory([wellcon1, wellcon2, wellcon2_additional_wellcon])
+    
+    wellhead1 = NexusWellhead(name='P01WH', date='01/01/2020', unit_system=UnitSystem.METRIC, 
+                              date_format=DateFormat.DD_MM_YYYY, hyd_method=23, depth=2052.2, well='P01')
+    wellhead2 = NexusWellhead(name='P02WH', date='01/01/2020', unit_system=UnitSystem.METRIC,
+                              date_format=DateFormat.DD_MM_YYYY, hyd_method=25, depth=2152.2, well='P02')
+    model.network.wellheads._add_to_memory([wellhead1, wellhead2])
 
     # add some constraints
     constraints = {'P01': [NexusConstraint(name='P01', max_gor=100000, max_pressure=234.223,
@@ -105,6 +113,10 @@ def test_write_surface_section(pvt_type, eos_details, expected_pvt_string):
         NexusNodeList(name='nodelist_2', date='01/01/2021', date_format=DateFormat.DD_MM_YYYY,
                      elements_in_the_list=['NODE3', 'NODE4']),
     ])
+    
+    # add some procs
+    model.network.procs._add_to_memory([NexusProc(date='15/10/2021', name='STATIC_VARS', priority=1, contents=["THIS IS TEXT"],
+                               date_format=DateFormat.DD_MM_YYYY)])
 
     expected_result = f"""{expected_pvt_string}
 
@@ -113,12 +125,19 @@ def test_write_surface_section(pvt_type, eos_details, expected_pvt_string):
 ENDCONSTRAINTS
 
 TIME 01/01/2020
+
 WELLS
 NAME STREAM NUMBER DATUM DATGRAD CROSS_SHUT CROSSFLOW ND GASMOB
 P01 PRODUCER 1 14000 MOBGRAD OFF OFF NA NA
 P02 PRODUCER 2 14000 MOBGRAD OFF ON ND GASMETHOD
 ENDWELLS
 
+WELLHEAD
+WELL NAME DEPTH METHOD
+P01 P01WH 2052.2 23
+P02 P02WH 2152.2 25
+ENDWELLHEAD
+
 NODES
 NAME TYPE DEPTH
 NODE1 test NA
@@ -156,6 +175,7 @@ def test_write_surface_section(pvt_type, eos_details, expected_pvt_string):
 ENDCONSTRAINTS
 
 TIME 01/01/2021
+
 WELLLIST welllist1
 CLEAR
 ADD
@@ -185,12 +205,17 @@ def test_write_surface_section(pvt_type, eos_details, expected_pvt_string):
 ENDACTIVATE
 
 TIME 15/10/2021
+
 DEACTIVATE
 CONNECTION
 P02
 P01
 ENDDEACTIVATE
 
+PROCS NAME STATIC_VARS PRIORITY 1
+THIS IS TEXT
+ENDPROCS
+
 """
 
     # Act
diff --git a/tests/Nexus/writing_tests/test_write_out_simulator.py b/tests/Nexus/writing_tests/test_write_out_simulator.py
index fd7a5d7c..904252d8 100644
--- a/tests/Nexus/writing_tests/test_write_out_simulator.py
+++ b/tests/Nexus/writing_tests/test_write_out_simulator.py
@@ -268,6 +268,7 @@ def test_write_new_simulator(self, mocker):
         expected_surface_file_content = '''BLACKOIL
 
 TIME 01/01/2020
+
 CONSTRAINTS
 well1 QOSMAX 10240
 ENDCONSTRAINTS