The type definition for an asset includes a property setting called Policies Can Be Applied. This property determines whether assets of the given type are policy-enabled (i.e., whether design/change-time policies are to be executed against them). When this property is enabled, you can create policies that are specific to the assets of that type. Additionally, instances of that type are capable of triggering design/change-time policies that target "assets" in general.

By default, the Policies Can Be Applied property is enabled for an asset type. If you do not want instances of particular asset type to be affected by design/change-time policies, disable this property in the asset's type definition.