When you add new page, post, custom post, category, custom taxonomy or navigation menu, than Default Access Rules will be applied that are set in general options for that specific type.
So, those default rules will become editable from that particular page/post having meta box and that can be changed easily.
Also, you can allow to use “ARMember Access Rules” meta box to other role of users too then, you can achieve this by simply assign arm_content_access_rules_metabox capability/permission to the user.
