diff --git a/packages/@aws-cdk/cfnspec/CHANGELOG.md b/packages/@aws-cdk/cfnspec/CHANGELOG.md
index e8761bad2c463..46c4e11c63d1e 100644
--- a/packages/@aws-cdk/cfnspec/CHANGELOG.md
+++ b/packages/@aws-cdk/cfnspec/CHANGELOG.md
@@ -1,3 +1,38 @@
+
+# Serverless Application Model (SAM) Resource Specification v2016-10-31
+
+## New Resource Types
+
+
+## Attribute Changes
+
+
+## Property Changes
+
+* AWS::Serverless::Function Policies.ItemTypes (__deleted__)
+* AWS::Serverless::Function Policies.PrimitiveItemTypes (__deleted__)
+* AWS::Serverless::Function Policies.InclusiveItemTypes (__added__)
+* AWS::Serverless::Function Policies.InclusivePrimitiveItemTypes (__added__)
+* AWS::Serverless::StateMachine Policies.ItemTypes (__deleted__)
+* AWS::Serverless::StateMachine Policies.PrimitiveItemTypes (__deleted__)
+* AWS::Serverless::StateMachine Policies.InclusiveItemTypes (__added__)
+* AWS::Serverless::StateMachine Policies.InclusivePrimitiveItemTypes (__added__)
+
+## Property Type Changes
+
+* AWS::Serverless::Function.RequestModel (__added__)
+* AWS::Serverless::Function.RequestParameter (__added__)
+* AWS::Serverless::Function.ApiEvent RequestModel (__added__)
+* AWS::Serverless::Function.ApiEvent RequestParameters (__added__)
+* AWS::Serverless::Function.IAMPolicyDocument Version (__added__)
+* AWS::Serverless::Function.IAMPolicyDocument Statement.PrimitiveType (__deleted__)
+* AWS::Serverless::Function.IAMPolicyDocument Statement.ItemType (__added__)
+* AWS::Serverless::Function.IAMPolicyDocument Statement.Type (__added__)
+* AWS::Serverless::StateMachine.IAMPolicyDocument Version (__added__)
+* AWS::Serverless::StateMachine.IAMPolicyDocument Statement.PrimitiveType (__deleted__)
+* AWS::Serverless::StateMachine.IAMPolicyDocument Statement.ItemType (__added__)
+* AWS::Serverless::StateMachine.IAMPolicyDocument Statement.Type (__added__)
+
 # CloudFormation Resource Specification v68.0.0
 
 ## New Resource Types
diff --git a/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json b/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json
index db062f8d876bf..0c8307f05357a 100644
--- a/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json
+++ b/packages/@aws-cdk/cfnspec/spec-source/specification/100_sam/000_official/spec.json
@@ -336,6 +336,25 @@
                     "Required": true,
                     "UpdateType": "Immutable"
                 },
+                "RequestModel": {
+                    "Documentation": "https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api",
+                    "Required": false,
+                    "Type": "RequestModel",
+                    "UpdateType": "Immutable"
+                },
+                "RequestParameters": {
+                    "Documentation": "https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api",
+                    "InclusiveItemPattern": true,
+                    "InclusiveItemTypes": [
+                        "RequestParameter"
+                    ],
+                    "InclusivePrimitiveItemTypes": [
+                        "String"
+                    ],
+                    "Required": false,
+                    "Type": "List",
+                    "UpdateType": "Immutable"
+                },
                 "RestApiId": {
                     "Documentation": "https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api",
                     "PrimitiveType": "String",
@@ -824,7 +843,14 @@
             "Properties": {
                 "Statement": {
                     "Documentation": "http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies.html",
-                    "PrimitiveType": "Json",
+                    "ItemType": "Json",
+                    "Required": true,
+                    "Type": "List",
+                    "UpdateType": "Immutable"
+                },
+                "Version": {
+                    "Documentation": "http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies.html",
+                    "PrimitiveType": "String",
                     "Required": true,
                     "UpdateType": "Immutable"
                 }
@@ -967,6 +993,52 @@
                 }
             }
         },
+        "AWS::Serverless::Function.RequestModel": {
+            "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestmodel.html",
+            "Properties": {
+                "Model": {
+                    "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestmodel.html#sam-function-requestmodel-model",
+                    "PrimitiveType": "String",
+                    "Required": true,
+                    "UpdateType": "Immutable"
+                },
+                "Required": {
+                    "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestmodel.html#sam-function-requestmodel-required",
+                    "PrimitiveType": "Boolean",
+                    "Required": false,
+                    "UpdateType": "Immutable"
+                },
+                "ValidateBody": {
+                    "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestmodel.html#sam-function-requestmodel-validatebody",
+                    "PrimitiveType": "Boolean",
+                    "Required": false,
+                    "UpdateType": "Immutable"
+                },
+                "ValidateParameters": {
+                    "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestmodel.html#sam-function-requestmodel-validateparameters",
+                    "PrimitiveType": "Boolean",
+                    "Required": false,
+                    "UpdateType": "Immutable"
+                }
+            }
+        },
+        "AWS::Serverless::Function.RequestParameter": {
+            "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestparameter.html",
+            "Properties": {
+                "Caching": {
+                    "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestparameter.html#sam-function-requestparameter-caching",
+                    "PrimitiveType": "Boolean",
+                    "Required": false,
+                    "UpdateType": "Immutable"
+                },
+                "Required": {
+                    "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-requestparameter.html#sam-function-requestparameter-required",
+                    "PrimitiveType": "Boolean",
+                    "Required": false,
+                    "UpdateType": "Immutable"
+                }
+            }
+        },
         "AWS::Serverless::Function.S3Event": {
             "Documentation": "https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#s3",
             "Properties": {
@@ -1805,7 +1877,14 @@
             "Properties": {
                 "Statement": {
                     "Documentation": "http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies.html",
-                    "PrimitiveType": "Json",
+                    "ItemType": "Json",
+                    "Required": true,
+                    "Type": "List",
+                    "UpdateType": "Immutable"
+                },
+                "Version": {
+                    "Documentation": "http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies.html",
+                    "PrimitiveType": "String",
                     "Required": true,
                     "UpdateType": "Immutable"
                 }
@@ -2275,11 +2354,11 @@
                 },
                 "Policies": {
                     "Documentation": "https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction",
-                    "ItemTypes": [
+                    "InclusiveItemTypes": [
                         "IAMPolicyDocument",
                         "SAMPolicyTemplate"
                     ],
-                    "PrimitiveItemTypes": [
+                    "InclusivePrimitiveItemTypes": [
                         "String"
                     ],
                     "PrimitiveTypes": [
@@ -2586,11 +2665,11 @@
                 },
                 "Policies": {
                     "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-resource-statemachine.html",
-                    "ItemTypes": [
+                    "InclusiveItemTypes": [
                         "IAMPolicyDocument",
                         "SAMPolicyTemplate"
                     ],
-                    "PrimitiveItemTypes": [
+                    "InclusivePrimitiveItemTypes": [
                         "String"
                     ],
                     "PrimitiveTypes": [