Section: 5.7.2.4 Failure to deliver ULInformationTransfer message
Content: The UE shall: 1> if AS security is not started and radio link failure occurs before the successful delivery of ULInformationTransfer messages has been confirmed by lower layers; or 1> if PDCP re-establishment or release/addition (e.g due to key refresh upon PCell or PSCell change, or RRC connection re-establishment, or failure of resume procedure initiated for SDT) occurs on an SRB on which ULInformationTransfer messages were submitted for transmission but successful delivery of these messages was not confirmed by lower layers: 2> inform upper layers about the possible failure to deliver the information contained in the concerned ULInformationTransfer messages, unless the messages only include dedicatedInfoF1c.