diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json
index a2135901457b..dabd80c28418 100644
--- a/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/billing.json
@@ -2629,6 +2629,94 @@
           }
         }
       }
+    },
+	"/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/customers/{customerName}/policies/default": {
+      "get": {
+        "tags": [
+          "Policies"
+        ],
+        "operationId": "Policies_GetByCustomer",
+        "description": "The policy for a given billing account name and customer name.",
+        "externalDocs": {
+          "url": "https://docs.microsoft.com/en-us/rest/api/billing/"
+        },
+        "x-ms-examples": {
+          "PolicyByCustomer": {
+            "$ref": "./examples/CustomerPolicy.json"
+          }
+        },
+        "parameters": [
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/customerNameParameter"
+          },
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/CustomerPolicy"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      },
+      "put": {
+        "tags": [
+          "Policies"
+        ],
+        "operationId": "Policies_UpdateCustomer",
+        "description": "The operation to update a Customer policy.",
+        "x-ms-examples": {
+          "UpdateCustomer": {
+            "$ref": "./examples/UpdateCustomerPolicy.json"
+          }
+        },
+        "parameters": [
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/customerNameParameter"
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/CustomerPolicy"
+            },
+            "description": "Parameters supplied to the update customer policy operation."
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/CustomerPolicy"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
     },
     "/subscriptions/{subscriptionId}/providers/Microsoft.Billing/billingProperty/default": {
       "get": {
@@ -6452,6 +6540,39 @@
           }
         }
       }
+    },
+	"CustomerPolicy": {
+      "description": "The Customer's Policy.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/Resource"
+        }
+      ],
+      "properties": {
+        "properties": {
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/CustomerPolicyProperties",
+          "title": "Customer Policy properties"
+        }
+      }
+    },
+    "CustomerPolicyProperties": {
+      "description": "The properties of a Customer's policy.",
+      "properties": {
+        "viewCharges": {
+          "description": "Customer can view retail prices.",
+          "type": "string",
+          "enum": [
+            "Allowed",
+            "NotAllowed"
+          ],
+          "x-ms-enum": {
+            "name": "ViewCharges",
+            "modelAsString": true
+          }
+        }
+      }
     },
     "AvailableBalance": {
       "description": "Latest available balance on Monetary Credit PI.",
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/examples/CustomerPolicy.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/examples/CustomerPolicy.json
new file mode 100644
index 000000000000..c7560944a6e2
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/examples/CustomerPolicy.json
@@ -0,0 +1,19 @@
+{
+  "parameters": {
+    "api-version": "2019-10-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "customerName": "{customerName}"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/customers/{customerName}/policies/default",
+        "name": "default",
+        "type": "Microsoft.Billing/billingAccounts/customers/policies",
+        "properties": {
+          "viewCharges": "Allowed"
+        }
+      }
+    }
+  }
+}
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/examples/UpdateCustomerPolicy.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/examples/UpdateCustomerPolicy.json
new file mode 100644
index 000000000000..8d96d102afda
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2019-10-01-preview/examples/UpdateCustomerPolicy.json
@@ -0,0 +1,25 @@
+{
+  "parameters": {
+    "api-version": "2019-10-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "customerName": "{customerName}",
+    "eTag": "\"1d34d012214127f\"",
+    "parameters": {
+      "properties": {
+        "viewCharges": "NotAllowed"
+      }
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/customers/{customerName}/policies/default",
+        "name": "default",
+        "type": "Microsoft.Billing/billingAccounts/customers/policies",
+        "properties": {
+          "viewCharges": "NotAllowed"
+        }
+      }
+    }
+  }
+}