Section: 5.3.5.17.2.3 T421 expiry (Indirect path addition/change failure)
Content: The UE shall: 1> if T421 expires; or 1> if the (target) L2 U2N Relay UE (i.e., the UE indicated by sl-IndirectPathRelayUE-Identity in the received sl-IndirectPathAddChange) changes its serving PCell to a different cell from the target cell (i.e. the cell indicated by sl-IndirectPathCellIdentity in the received sl-IndirectPathAddChange) before path addition or change: 2> if MCG transmission is not suspended: 3> initiate the indirect path failure information procedure as specified in clause 5.7.3c to report indirect path addition/change failure; 2> else: 3> initiate the connection re-establishment procedure as specified in clause 5.3.7;