Section: 5.7.3c.2 Initiation
Content: In case of MP, a MP remote UE initiates the procedure to report indirect path failures when neither MCG nor indirect path transmission is suspended and when one of the following conditions is met: 1> upon detecting a SL indirect path failure resulting from sidelink radio link failure on the PC5 unicast link or receiption of NotificationMessageSidelink from the L2 U2N Relay UE indicating Uu failure, or indirect path addition/change failure in accordance with 5.3.5.17.2.3; or 1> upon detecting a N3C indirect path failure, including N3C connection failure or Uu failure of the relay UE with N3C indirect path; Upon initiating the procedure, the UE shall: 1> if the procedure was initiated to report SL indirect path failure: 2> reset the sidelink specific MAC of this destination; 2> stop T421 if running; 1> suspend indirect path transmission for all SRBs and DRBs; 1> initiate transmission of the IndirectPathFailureInformation message in accordance with 5.7.3c.4;