Question: In a UICC-terminal interaction for a non-removable Universal Subscriber Identity Module (nrUSIM), what condition determines whether the UE sends a fresh generated SUCI or a stored SUCI in an IDENTITY RESPONSE message?
Option 1: Based on the availability of the 5G-GUTI
Option 2: Depending on the execution status of READ commands on specific EFs (e.g., EFSUCI_Calc_Info)
Option 3: According to the UE's registration status (e.g., after receiving a REGISTRATION COMPLETE message)
Option 4: Based on whether timer T3519 is running or not
Explanation: The correct answer highlights the specific condition (timer T3519's state) that dictates the type of SUCI (freshly generated or stored) sent by the UE in an IDENTITY RESPONSE message, demonstrating an understanding of nuanced interaction between UE behavior and timer states in telecom networks.