lang for sec policy exceptions

docs/content/contributing/terraform/testing.md

@@ -88,8 +88,9 @@ If you get failures, you should examine them to understand how you can make your
 
 ### Creating exceptions
 
-In some circumstances, you may need to create an exception for a policy, you can do so by creating a `.rego` file in the `exceptions` sub-directory of your example.
-For example, to exclude the rule called `"configure_aks_default_node_pool_zones"`, create a file called `exceptions/exception.rego` in your example, with the following content:
+As a general rule, exceptions should only be applied to module examples where you are testing valid but non-compliant configurations. Root module defaults should still comply with WAF and Security best practices. However, if you need to create an exception for a policy, you can do so by creating a `.rego` file in the `exceptions` sub-directory of your example.
+
+For example, to exclude the Azure Proactive Resiliency Library policy rule called `"configure_aks_default_node_pool_zones"`, create a file called `exceptions/exception.rego` in your example with the following content:
 
 ```rego
 package Azure_Proactive_Resiliency_Library_v2
@@ -99,6 +100,16 @@ exception contains rules if {
 }
 ```
 
+To exclude security policy rules the content varies slightly. Instead of using the `Azure_Proactive_Resiliency_Library_v2` package, you will instead need to include the `avmsec` package. An example of this would use the following pattern:
+
+```rego
+package avmsec
+import rego.v1
+exception contains rules if {
+  rules = ["AVM_SEC_178"]
+}
+```
+
 ## TFLint
 
 TFLint is used to check that your module is compliant with the AVM specifications.