diff --git a/fast/stages/0-org-setup/schemas/organization.schema.json b/fast/stages/0-org-setup/schemas/organization.schema.json
index 4092e5320..3f82b7e6f 100644
--- a/fast/stages/0-org-setup/schemas/organization.schema.json
+++ b/fast/stages/0-org-setup/schemas/organization.schema.json
@@ -178,6 +178,85 @@
     "iam_by_principals_additive": {
       "$ref": "#/$defs/iam_by_principals"
     },
+    "iam_deny_policies": {
+      "type": "object",
+      "additionalProperties": false,
+      "patternProperties": {
+        "^[a-z0-9-]+$": {
+          "type": "object",
+          "additionalProperties": false,
+          "required": [
+            "rules"
+          ],
+          "properties": {
+            "display_name": {
+              "type": "string"
+            },
+            "rules": {
+              "type": "array",
+              "items": {
+                "type": "object",
+                "additionalProperties": false,
+                "required": [
+                  "denied_permissions",
+                  "denied_principals"
+                ],
+                "properties": {
+                  "description": {
+                    "type": "string"
+                  },
+                  "denied_permissions": {
+                    "type": "array",
+                    "items": {
+                      "type": "string"
+                    }
+                  },
+                  "denied_principals": {
+                    "type": "array",
+                    "items": {
+                      "type": "string"
+                    }
+                  },
+                  "denial_condition": {
+                    "type": "object",
+                    "additionalProperties": false,
+                    "required": [
+                      "expression"
+                    ],
+                    "properties": {
+                      "expression": {
+                        "type": "string"
+                      },
+                      "title": {
+                        "type": "string"
+                      },
+                      "description": {
+                        "type": "string"
+                      },
+                      "location": {
+                        "type": "string"
+                      }
+                    }
+                  },
+                  "exception_permissions": {
+                    "type": "array",
+                    "items": {
+                      "type": "string"
+                    }
+                  },
+                  "exception_principals": {
+                    "type": "array",
+                    "items": {
+                      "type": "string"
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "logging": {
       "type": "object",
       "additionalProperties": false,
diff --git a/fast/stages/0-org-setup/schemas/organization.schema.md b/fast/stages/0-org-setup/schemas/organization.schema.md
index 9523f7334..d22bd9b7d 100644
--- a/fast/stages/0-org-setup/schemas/organization.schema.md
+++ b/fast/stages/0-org-setup/schemas/organization.schema.md
@@ -56,6 +56,29 @@
 - **iam_by_principals**: *reference([iam_by_principals](#refs-iam_by_principals))*
 - **iam_by_principals_conditional**: *reference([iam_by_principals_conditional](#refs-iam_by_principals_conditional))*
 - **iam_by_principals_additive**: *reference([iam_by_principals](#refs-iam_by_principals))*
+- **iam_deny_policies**: *object*
+  <br>*additional properties: false*
+  - **`^[a-z0-9-]+$`**: *object*
+    <br>*additional properties: false*
+    - **display_name**: *string*
+    - ⁺**rules**: *array*
+      - items: *object*
+        <br>*additional properties: false*
+        - **description**: *string*
+        - ⁺**denied_permissions**: *array*
+          - items: *string*
+        - ⁺**denied_principals**: *array*
+          - items: *string*
+        - **denial_condition**: *object*
+          <br>*additional properties: false*
+          - ⁺**expression**: *string*
+          - **title**: *string*
+          - **description**: *string*
+          - **location**: *string*
+        - **exception_permissions**: *array*
+          - items: *string*
+        - **exception_principals**: *array*
+          - items: *string*
 - **logging**: *object*
   <br>*additional properties: false*
   - **kms_key_name**: *string*