diff --git a/docs/changelog.rst b/docs/changelog.rst
index 82f66d2..be6264f 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -1,6 +1,19 @@
 Changelog
 =========
 
+1.0.5 (YYYY-MM-DD)
+------------------
+
+Changed
+~~~~~~~
+
+-  :ref:`schema-strict`: Remove "integer" type from ID fields. Add validation rules:
+
+  - "format": "email" if the key is "email"
+  - "minimum": 0 to "quantity", "durationInDays" and "numberOfTenderers fields
+  - "required": ["id", "name"] to "Organization" and "OrganizationReference"
+  - "required": ["id"] to "Amendment" and "RelatedProcess"
+
 1.0.4 (2022-02-10)
 ------------------
 
diff --git a/docs/cli/schema.rst b/docs/cli/schema.rst
index df4751a..fd1b64f 100644
--- a/docs/cli/schema.rst
+++ b/docs/cli/schema.rst
@@ -89,7 +89,15 @@ Optional arguments:
 schema-strict
 -------------
 
-Adds "minItems" and "uniqueItems" if an array, "minProperties" if an object and "minLength" if a string and "enum", "format" and "pattern" are not set.
+Adds:
+* "minItems" and "uniqueItems" if an array, adds "minProperties" if an object
+* "minLength" if a string and if "enum", "format" and "pattern" aren't set
+* "format": "email" if the key is "email"
+* "minimum": 0 to "quantity", "durationInDays" and "numberOfTenderers fields
+* "required": ["id", "name"] to "Organization" and "OrganizationReference"
+* "required": ["id"] to "Amendment" and "RelatedProcess"
+
+Removes "integer" from "type" for ID fields.
 
 Optional arguments:
 
diff --git a/ocdskit/schema.py b/ocdskit/schema.py
index 8f9ff03..61c9a4c 100644
--- a/ocdskit/schema.py
+++ b/ocdskit/schema.py
@@ -203,8 +203,15 @@ def _deprecated(value):
 
 def add_validation_properties(schema, unique_items=True, coordinates=False):
     """
-    Adds "minItems" and "uniqueItems" if an array, adds "minProperties" if an object, and adds "minLength" if a string
-    and if "enum", "format" and "pattern" aren't set.
+    Adds:
+    * "minItems" and "uniqueItems" if an array, adds "minProperties" if an object
+    * "minLength" if a string and if "enum", "format" and "pattern" aren't set
+    * "format": "email" if the key is "email"
+    * "minimum": 0 to "quantity", "durationInDays" and "numberOfTenderers fields
+    * "required": ["id", "name"] to "Organization" and "OrganizationReference"
+    * "required": ["id"] to "Amendment" and "RelatedProcess"
+
+    Removes "integer" from "type" for ID fields.
 
     :param dict schema: a JSON schema
     :param bool unique_items: whether to add "uniqueItems" properties to array fields
@@ -234,5 +241,21 @@ def add_validation_properties(schema, unique_items=True, coordinates=False):
             if 'object' in schema['type']:
                 schema.setdefault('minProperties', 1)
 
-        for value in schema.values():
+        for key, value in schema.items():
+            if key == 'email':
+                value['format'] = 'email'
+            elif key in ['quantity', 'durationInDays', 'numberOfTenderers']:
+                value['minimum'] = 0
+            elif key in ['Organization', 'OrganizationReference']:
+                value['required'] = ['id', 'name']
+                value['properties']['name']['type'] = "string"
+                value['properties']['id']['type'] = "string"
+            elif key in ['Amendment', 'RelatedProcess']:
+                value['required'] = ['id']
+                value['properties']['id']['type'] = "string"
+            elif key == 'id':
+                if 'type' in value:
+                    if 'integer' in value['type']:
+                        value['type'].remove('integer')
+
             add_validation_properties(value, unique_items=unique_items, coordinates=coordinates)