Section: 5.9.4.3 MBS frequencies of interest determination
Content: The UE shall: 1> consider a frequency to be part of the MBS frequencies of interest if the following conditions are met: 2> at least one MBS session the UE is receiving or interested to receive via a broadcast MRB is ongoing or about to start; and NOTE 1: The UE may determine whether the session is ongoing from the start and stop time indicated in the User Service Description (USD), see TS 38.300[ NR; NR and NG-RAN Overall description; Stage-2 ]  [2] or TS 23.247[ Architectural enhancements for 5G multicast-broadcast services ]  [67]. 2> for at least one of these MBS sessions, SIB21 acquired from the PCell or a non-serving cell includes mapping between the concerned frequency and one or more MBS FSAIs indicated in the USD for this session, or for at least one of these MBS sessions, the concerned frequency is not included in SIB21 but is indicated in the USD for this session; and NOTE 2: The UE considers a frequency to be part of the MBS frequencies of interest even though NG-RAN may (temporarily) not employ a broadcast MRB for the concerned session, i.e., the UE does not verify if the session is indicated on MCCH. 2> the supportedBandCombinationList the UE included in UE-NR-Capability contains at least one band combination including the concerned MBS frequency. NOTE 3: When evaluating which frequencies the UE is capable of receiving, the UE does not take into account whether they are currently configured as serving frequencies.