Section: 8.2.28.1 Message definition
Content: This message is sent by the UE or the network to transfer a plain 5GS NAS message as specified in subclause 8.2 together with the sequence number and the message authentication code protecting the message. See table 8.2.28.1.1. Message type: SECURITY PROTECTED 5GS NAS MESSAGE Significance: dual Direction: both Table 8.2.28.1.1: SECURITY PROTECTED 5GS NAS MESSAGE message content NOTE: The minimum length of Plain 5GS NAS message IE can be 2 octets if it includes a Test Mode Control message specified in 3GPP TS 38.509[ 5GS; Special conformance testing functions for User Equipment (UE) ]  [31AA].