Question: What happens when the lower layers indicate that access barring is applicable for all access categories except category 0 and the access category with which the access attempt was associated is other than 0?
Option 1: The UE proceeds as specified for case a, but only if the access category is 6.
Option 2: The UE shall proceed as specified for case a.
Option 3: The UE-initiated NAS transport procedure is started immediately.
Option 4: The UE stays in the current serving cell and applies the normal cell reselection process without attempting to send the UL NAS TRANSPORT message.
Explanation: According to the text, if the lower layers indicate that access barring is applicable for all access categories except category 0 and the access category with which the access attempt was associated is other than 0, then the UE shall proceed as specified for case a. This means that the UE will follow the same procedure as in case a, without any additional conditions or exceptions.