Adding some app requirements sent via email

Author: drewbatgit

hub/apps/develop/action-framework/action-provider-manifest.md

@@ -32,3 +32,11 @@ Action providers must provide a **Registration** element which specifies the pat
 </uap3:Extension> 
 
 ```
+
+## Additional requirements
+
+Both COM and URI-launched action providers must have package identity. Package identity is declare in the app package manifest file using the [Identity](/uwp/schemas/appxpackage/uapmanifestschema/element-identity) element. For more information, see [An overview of Package Identity in Windows apps](/windows/apps/desktop/modernize/package-identity-overview).
+
+COM-based action providers must have be *full trust apps* which have an integrity level of *mediumIL*. This is declared in the app package manifest file by setting the [*uap10:TrustLevel](/uwp/schemas/appxpackage/uapmanifestschema/element-uap10-extension) attribute to "mediumIL".
+
+URI-launched action providers must also have a trust level of *mediumIL*. If a URI-launched action provider will return outputs, the app must implement the ability to be launched for results. For more information, see [Launch an app for results](/windows/uwp/launch-resume/how-to-launch-an-app-for-results). URI-launched action providers that return outputs must also instantiate the runtime.