Section: 5.2.2.4.13 Actions upon reception of SIB12
Content: Upon receiving SIB12, the UE shall: 1> if the UE has stored at least one segment of SIB12 and the value tag of SIB12 has changed since a previous segment was stored: 2> discard all stored segments; 1> store the segment; 1> if all segments have been received: 2> assemble SIB12-IEs from the received segments; 2> if sl-FreqInfoList/sl-FreqInfoListSizeExt is included in SIB12-IEs: 3> if configured to receive NR sidelink communication: 4> use the resource pool(s) indicated by sl-RxPool for NR sidelink communication reception, as specified in 5.8.7; 3> if configured to transmit NR sidelink communication: 4> use the resource pool(s) indicated by sl-TxPoolSelectedNormal, or sl-TxPoolExceptional for NR sidelink communication transmission, as specified in 5.8.8; 4> perform CBR measurement on the transmission resource pool(s) indicated by sl-TxPoolSelectedNormal or sl-TxPoolExceptional for NR sidelink communication transmission, as specified in 5.5.3.1; 4> use the synchronization configuration parameters for NR sidelink communication on frequencies included in sl-FreqInfoList/sl-FreqInfoListSizeExt, as specified in 5.8.5; 3> if configured to receive NR sidelink discovery: 4> use the resource pool(s) indicated by sl-DiscRxPool or sl-RxPool for NR sidelink discovery reception, as specified in 5.8.13.2; 3> if configured to transmit NR sidelink discovery: 4> if the UE is configured by upper layers to transmit NR sidelink L2 U2N relay discovery messages and sl-L2U2N-Relay is included in SIB12; or 4> if the UE is configured by upper layers to transmit NR sidelink L3 U2N relay discovery messages and sl-L3U2N-RelayDiscovery is included in SIB12; or 4> if the UE is configured by upper layers to transmit NR sidelink non-relay discovery messages and sl-NonRelayDiscovery is included in SIB12: 5> use the resource pool(s) indicated by sl-DiscTxPoolSelected, sl-TxPoolExceptional or sl-TxPoolSelectedNormal for NR sidelink discovery transmission, as specified in 5.8.13.3; 5> perform CBR measurement on the transmission resource pool(s) indicated by sl-TxPoolSelectedNormal, sl-DiscTxPoolSelected or sl-TxPoolExceptional for NR sidelink discovery transmission, as specified in 5.5.3.1; 5> use the synchronization configuration parameters for NR sidelink discovery on frequencies included in sl-FreqInfoList, as specified in 5.8.5; 2> if sl-RadioBearerConfigList or sl-RLC-BearerConfigList is included in sl-ConfigCommonNR: 3> perform sidelink DRB addition/modification/release as specified in 5.8.9.1a.1/5.8.9.1a.2; 3> if sl-RLC-BearerConfigListSizeExt is included in SIB12-IEs: 4> perform additional sidelink RLC bearer addition/modification/release as specified in 5.8.9.1a.5/5.8.9.1a.6; 2> if sl-MeasConfigCommon is included in sl-ConfigCommonNR: 3> store the NR sidelink measurement configuration; 2> if sl-DRX-ConfigCommonGC-BC is included in SIB12-IEs: 3> store the NR sidelink DRX configuration and configure lower layers to perform sidelink DRX operation for groupcast and broadcast as specified in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3]; 1> if the UE is acting as L2 U2N Remote UE: 2> if the sl-TimersAndConstantsRemoteUE is included in SIB12: 3> use values for timers T300, T301 and T319 as included in the sl-TimersAndConstantsRemoteUE received in SIB12; 2> else: 3> use values for timers T300, T301 and T319 as included in the ue-TimersAndConstants received in SIB1; The UE should discard any stored segments for SIB12 if the complete SIB12 has not been assembled within a period of 3 hours. The UE shall discard any stored segments for SIB12 upon cell (re-)selection.