Question: Under what condition may the network include the Re-attempt indicator Information Element (IE) in a message?
Option 1: When the Back-off timer value IE is included and the 5GSM cause value is any valid cause.
Option 2: When the 5GSM cause value is #26 "insufficient resources" or #37 "5GS QoS not accepted".
Option 3: When the network includes the Back-off timer value IE and the 5GSM cause value is not one of the specified invalid causes (#26, #37, #44, #45, #46, #59, #67, #69, #83, or #84).
Option 4: When the Re-attempt indicator IE is required for a specific slice and DNN.
Explanation: The network may include the Re-attempt indicator IE only if it includes the Back-off timer value IE and the 5GSM cause value is not one of the specified invalid causes. This ensures that the re-attempt mechanism is used appropriately, avoiding unnecessary retries in cases where the request is fundamentally flawed or unsupported.