diff --git a/models/vendor-direct-fulfillment-payments-api-model/vendorDirectFulfillmentPaymentsV1.json b/models/vendor-direct-fulfillment-payments-api-model/vendorDirectFulfillmentPaymentsV1.json
index 440c7d6..7dd9fc4 100644
--- a/models/vendor-direct-fulfillment-payments-api-model/vendorDirectFulfillmentPaymentsV1.json
+++ b/models/vendor-direct-fulfillment-payments-api-model/vendorDirectFulfillmentPaymentsV1.json
@@ -57,17 +57,18 @@
                 "description": "Unique request reference identifier."
               }
             },
-            "x-amazon-spds-sandbox-behaviors": [
-              {
-                "request": {
-                  "parameters": {
-                    "body": {
-                      "value": {
-                        "invoices": [
-                          {
-                            "invoiceNumber": "0092590411",
-                            "invoiceDate": "2020-03-13T11:16:24Z",
-                            "remitToParty": {
+            "x-amzn-api-sandbox": {
+              "static": [
+                {
+                  "request": {
+                    "parameters": {
+                      "body": {
+                        "value": {
+                          "invoices": [
+                            {
+                              "invoiceNumber": "0092590411",
+                              "invoiceDate": "2020-03-13T11:16:24Z",
+                              "remitToParty": {
                               "partyId": "YourVendorCode",
                               "address": {
                                 "name": "vendor name",
@@ -194,7 +195,8 @@
                   }
                 }
               }
-            ]
+              ]
+            }
           },
           "400": {
             "description": "Request has missing or invalid parameters and cannot be parsed.",
@@ -211,17 +213,18 @@
                 "description": "Unique request reference identifier."
               }
             },
-            "x-amazon-spds-sandbox-behaviors": [
-              {
-                "request": {
-                  "parameters": {
-                    "body": {
-                      "value": {
-                        "invoices": [
-                          {
-                            "invoiceNumber": "TestInvoice400",
-                            "invoiceDate": "2020-08.13"
-                          }
+            "x-amzn-api-sandbox": {
+              "static": [
+                {
+                  "request": {
+                    "parameters": {
+                      "body": {
+                        "value": {
+                          "invoices": [
+                            {
+                              "invoiceNumber": "TestInvoice400",
+                              "invoiceDate": "2020-08.13"
+                            }
                         ]
                       }
                     }
@@ -246,8 +249,9 @@
                     }
                   ]
                 }
-              }
-            ]
+                }
+              ]
+            }
           },
           "403": {
             "description": "Indicates that access to the resource is forbidden. Possible reasons include Access Denied, Unauthorized, Expired Token, or Invalid Signature.",
@@ -267,6 +271,10 @@
               "$ref": "#/definitions/SubmitInvoiceResponse"
             },
             "headers": {
+              "x-amzn-RateLimit-Limit": {
+                "type": "string",
+                "description": "Your rate limit (requests per second) for this operation."
+              },
               "x-amzn-RequestId": {
                 "type": "string",
                 "description": "Unique request reference identifier."
@@ -281,7 +289,7 @@
             "headers": {
               "x-amzn-RateLimit-Limit": {
                 "type": "string",
-                "description": "Your rate limit (requests per second) for this operation."
+                "description": "Your rate limit (requests per second) for this operation.\n_Note:_ For this status code, the rate limit header is deprecated and no longer returned."
               },
               "x-amzn-RequestId": {
                 "type": "string",
@@ -297,7 +305,7 @@
             "headers": {
               "x-amzn-RateLimit-Limit": {
                 "type": "string",
-                "description": "Your rate limit (requests per second) for this operation."
+                "description": "Your rate limit (requests per second) for this operation.\n_Note:_ For this status code, the rate limit header is deprecated and no longer returned."
               },
               "x-amzn-RequestId": {
                 "type": "string",
@@ -313,7 +321,7 @@
             "headers": {
               "x-amzn-RateLimit-Limit": {
                 "type": "string",
-                "description": "Your rate limit (requests per second) for this operation."
+                "description": "Your rate limit (requests per second) for this operation.\n_Note:_ For this status code, the rate limit header is deprecated and no longer returned."
               },
               "x-amzn-RequestId": {
                 "type": "string",
@@ -329,7 +337,7 @@
             "headers": {
               "x-amzn-RateLimit-Limit": {
                 "type": "string",
-                "description": "Your rate limit (requests per second) for this operation."
+                "description": "Your rate limit (requests per second) for this operation.\n_Note:_ For this status code, the rate limit header is deprecated and no longer returned."
               },
               "x-amzn-RequestId": {
                 "type": "string",
@@ -345,7 +353,7 @@
             "headers": {
               "x-amzn-RateLimit-Limit": {
                 "type": "string",
-                "description": "Your rate limit (requests per second) for this operation."
+                "description": "Your rate limit (requests per second) for this operation.\n_Note:_ For this status code, the rate limit header is deprecated and no longer returned."
               },
               "x-amzn-RequestId": {
                 "type": "string",