Question: What happens when a UICC's ISIM ADF-level EFARR (Access Rule Reference) file is inaccessible, and an application attempts to access a file with rules referenced in EFARR?
Option 1: The UICC grants access to the file after a predefined timeout.
Option 2: The UICC redirects the access request to a default access rule set.
Option 3: The UICC notifies the User Equipment (UE) to authenticate again before retrying.
Option 4: The UICC denies any attempt to access the file with rules indicated in this EFARR.
Explanation: According to the specifications, if the card cannot access EFARR, any attempt to access a file with access rules indicated in this EFARR shall not be granted. This ensures security by preventing unauthorized access when the access control mechanism itself is unreachable, highlighting the importance of access rule management in telecom networks for secure service provision.