diff --git a/VERSION b/VERSION
index e30309f7..f041bc6d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.4.7
+2.4.8
diff --git a/entity-api-spec.yaml b/entity-api-spec.yaml
index 7cd58bfe..647b4aed 100644
--- a/entity-api-spec.yaml
+++ b/entity-api-spec.yaml
@@ -434,7 +434,7 @@ components:
             - block
             - section
             - suspension
-          description: 'A code representing the type of specimen. Must be an organ, block, section, or suspension'
+          description: 'A code representing the type of specimen. Must be an organ, block, section, or suspension, in all lower case.'
         protocol_url:
           type: string
           description: 'The protocols.io doi url pointing the protocol under wich the sample was obtained and/or prepared.'
@@ -482,7 +482,7 @@ components:
             - TR
             - UR
             - UT
-          description: 'Organ code specifier, only set if sample_category == organ.  Valid values found in: [organ types](https://github.com/hubmapconsortium/search-api/blob/main/src/search-schema/data/definitions/enums/organ_types.yaml)'
+          description: 'Organ code specifier, only set if sample_category == organ.  Valid values found in: [organ types](https://ontology.api.hubmapconsortium.org/organs/by-code?application_context=HUBMAP)'
         organ_other:
           type: string
           description: The organ type provided by the user if "other" organ type is selected
@@ -903,6 +903,12 @@ components:
             $ref: '#/components/schemas/Dataset'
           readOnly: true
           description: 'The datasets that are contained in this Upload.'
+        anticipated_complete_upload_month:
+          type: string
+          description: 'The month that the Upload is anticipated to have all required data uploaded, in the format YYYY-MM.'
+        anticipated_dataset_count:
+          type: integer
+          description: 'The total number of datasets that this Upload will eventually contain.'
     Collection:
       type: object
       properties:
diff --git a/src/app.py b/src/app.py
index 23f16fc1..26d907ef 100644
--- a/src/app.py
+++ b/src/app.py
@@ -1272,7 +1272,15 @@ def create_multiple_samples(count):
         # No need to log the validation errors
         bad_request_error(str(e))
 
-    # `direct_ancestor_uuid` is required on create
+    try:
+        schema_manager.execute_property_level_validators('before_property_create_validators', normalized_entity_type, request, {}, json_data_dict)
+    # Currently only ValueError
+    except ValueError as e:
+        bad_request_error(e)
+    except schema_errors.UnimplementedValidatorException as uve:
+        internal_server_error(uve)
+
+    # `direct_ancestor_uuid` is required on create for a Sample.
     # Check existence of the direct ancestor (either another Sample or Donor)
     direct_ancestor_dict = query_target_entity(json_data_dict['direct_ancestor_uuid'], user_token)
 
@@ -1288,7 +1296,7 @@ def create_multiple_samples(count):
         if ('organ' not in json_data_dict) or (not json_data_dict['organ']):
             bad_request_error("A valid organ code is required since the direct ancestor is a Donor")
 
-    # Generate 'before_create_triiger' data and create the entity details in Neo4j
+    # Generate 'before_create_trigger' data and create the entity details in Neo4j
     generated_ids_dict_list = create_multiple_samples_details(request, normalized_entity_type, user_token, json_data_dict, count)
 
     # Also index the each new Sample node in elasticsearch via search-api
diff --git a/src/schema/provenance_schema.yaml b/src/schema/provenance_schema.yaml
index 43c53dad..3f147f6d 100644
--- a/src/schema/provenance_schema.yaml
+++ b/src/schema/provenance_schema.yaml
@@ -1241,6 +1241,24 @@ ENTITIES:
         type: string
         indexed: true
         description: The organ code representing the organ type that the data contained in the upload will be registered/associated with.
+      anticipated_complete_upload_month:
+        type: string
+        indexed: true
+        description: The specific month the Upload is anticipated to have all required data uploaded, in the format YYYY-MM.
+        required_on_create: false
+        before_property_create_validators:
+          - validate_anticipated_complete_date
+        before_property_update_validators:
+          - validate_anticipated_complete_date
+      anticipated_dataset_count:
+        type: integer
+        indexed: true
+        description: The total number of datasets that this Upload will eventually contain.
+        required_on_create: false
+        before_property_create_validators:
+          - validate_anticipated_dataset_count
+        before_property_update_validators:
+          - validate_anticipated_dataset_count
 
   ############################################# EPICollection #############################################
   Epicollection:
diff --git a/src/schema/schema_validators.py b/src/schema/schema_validators.py
index 5a6fd5e1..e54923e2 100644
--- a/src/schema/schema_validators.py
+++ b/src/schema/schema_validators.py
@@ -542,6 +542,63 @@ def validate_upload_status_value(property_key, normalized_entity_type, request,
     if new_status not in accepted_status_values:
         raise ValueError(f"Invalid status value: {new_status}")
 
+"""
+Validate the anticipated_complete_data string provided for an Upload
+
+Parameters
+----------
+property_key : str
+    The target property key
+normalized_type : str
+    Submission
+request: Flask request object
+    The instance of Flask request passed in from application request
+existing_data_dict : dict
+    A dictionary that contains all existing entity properties
+new_data_dict : dict
+    The json data in request body, already after the regular validations
+"""
+def validate_anticipated_complete_date(property_key, normalized_entity_type, request, existing_data_dict, new_data_dict):
+    MAX_ANTICIPATED_COMPLETE_DATE = '2026-12'
+    anticipated_complete_date_str = new_data_dict[property_key]
+    if not re.fullmatch(pattern=r'^\d{4}-\d{2}$', string=anticipated_complete_date_str):
+        raise ValueError(f"Format of '{anticipated_complete_date_str}' does not match the format YYYY-MM")
+    anticipated_year, anticipated_month = map(int, anticipated_complete_date_str.split("-"))
+    if anticipated_month < 1 or anticipated_month > 12:
+        raise ValueError(f"Anticipated completion month of '{anticipated_complete_date_str[5:]}' is not valid")
+    now = datetime.now()
+    current_year = now.year
+    current_month = now.month
+    if  anticipated_year < current_year or \
+        (anticipated_year == current_year and anticipated_month < current_month):
+        raise ValueError(   f"Anticipated complete date '{anticipated_complete_date_str}'"
+                            f" cannot be before the current month.")
+    max_anticipated_year, max_anticipated_month = map(int, MAX_ANTICIPATED_COMPLETE_DATE.split("-"))
+    if anticipated_year > max_anticipated_year:
+        raise ValueError(   f"Anticipated complete date '{anticipated_complete_date_str}'"
+                            f" cannot be after '{MAX_ANTICIPATED_COMPLETE_DATE}'.")
+
+"""
+Validate the anticipated_dataset_count integer provided for an Upload
+
+Parameters
+----------
+property_key : str
+    The target property key
+normalized_type : str
+    Submission
+request: Flask request object
+    The instance of Flask request passed in from application request
+existing_data_dict : dict
+    A dictionary that contains all existing entity properties
+new_data_dict : dict
+    The json data in request body, already after the regular validations
+"""
+def validate_anticipated_dataset_count(property_key, normalized_entity_type, request, existing_data_dict, new_data_dict):
+    # anticipated_dataset_count of type int, assured by provenance_schema.yaml "type: integer"
+    anticipated_dataset_count = new_data_dict[property_key]
+    if anticipated_dataset_count <= 0:
+        raise ValueError(f"{property_key} must be positive integer when specified.")
 
 """
 Validate the provided value of Sample.sample_category on create via POST and update via PUT
@@ -564,8 +621,14 @@ def validate_sample_category(property_key, normalized_entity_type, request, exis
     sample_category = new_data_dict[property_key].lower()
 
     if sample_category not in defined_tissue_types:
-        raise ValueError(f"Invalid sample_category: {sample_category}")
-
+        raise ValueError(f"Invalid sample_category: {sample_category}."
+                         f" Should be one of {', '.join(defined_tissue_types)}.")
+
+    # Given the sample_category is a defined_tissue_types element, assure the request has
+    # the proper case for storage
+    if new_data_dict[property_key] != sample_category:
+        raise ValueError(f"The case of sample_category '{new_data_dict[property_key]}'"
+                         f" must be specified as '{sample_category}'.")
 
 """
 Validate the provided value of Publication.publication_date is in the correct format against ISO 8601 Format: 
diff --git a/src/schema_templating/example-yaml-templates/upload-schema.yaml b/src/schema_templating/example-yaml-templates/upload-schema.yaml
index 9f05e9f1..45a24b44 100644
--- a/src/schema_templating/example-yaml-templates/upload-schema.yaml
+++ b/src/schema_templating/example-yaml-templates/upload-schema.yaml
@@ -81,4 +81,10 @@ Upload:
       items:
         $ref: '#/components/schemas/Dataset'
       readOnly: true
-      description: "The datasets that are contained in this Upload."
\ No newline at end of file
+      description: "The datasets that are contained in this Upload."
+    anticipated_complete_upload_month:
+      type: string
+      description: The month that the Upload is anticipated to have all required data uploaded, in the format YYYY-MM.
+    anticipated_dataset_count:
+      type: integer
+      description: The total number of datasets that this Upload will eventually contain.