Question: In a cellular network utilizing Access Control for RRC connection establishment attempts, what determines the validity of an Access Class from special categories for a User Equipment (UE)?
Option 1: The UE's randomly allocated class number
Option 2: The presence of a valid USIM application on the UE
Option 3: Whether the UE is operating within its Home Public Land Mobile Network (HPLMN) or HPLMN country
Option 4: The network's current barring configuration for all classes
Explanation: This determines the validity of an Access Class from special categories based on the UE's location, specifically being within its Home Public Land Mobile Network (HPLMN) or HPLMN country, impacting priority access management and user service expectations across different locations.