Section: 5.8.5.2 Initiation
Content: A UE capable of NR sidelink communication/discovery and SLSS/PSBCH transmission shall, when transmitting NR sidelink communication/discovery/positioning, and if the conditions for NR sidelink communication/discovery/positioning operation are met and when the following conditions are met: 1> if in coverage on the frequency used for NR sidelink communication/discovery/positioning, as defined in TS 38.304[ NR; User Equipment (UE) procedures in Idle mode and in RRC Inactive state ]  [20]; and has selected GNSS or the cell as synchronization reference as defined in 5.8.6.3; or 1> if out of coverage on the frequency used for NR sidelink communication/discovery/positioning, and the frequency used to transmit NR sidelink communication/discovery is included in sl-FreqInfoToAddModList/sl-FreqInfoToAddModListExt in sl-ConfigDedicatedNR within RRCReconfiguration message or included in sl-FreqInfoList/sl-FreqInfoListSizeExt within SIB12 or SIB23 for NR sidelink positioning; and has selected GNSS or the cell as synchronization reference as defined in 5.8.6.3: 2> if sl-SyncFreqList is neither included in RRCReconfiguration nor in SIB12; or 2> if sl-SyncFreqList is included in RRCReconfiguration or in SIB12; and if none of the frequency(ies) selected as specified in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] is included in the sl-SyncFreqList or the concerned frequency is selected as the synchronisation carrier frequency in accordance with 5.8.6.2; or 2> if sl-SyncFreqList and sl-SyncTxMultiFreq are included in RRCReconfiguration or in SIB12; and if the concerned frequency has been selected for NR sidelink communication transmission as specified in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] and is included in sl-SyncFreqList; and if the UE has selected a frequency other than the concerned frequency as the synchronisation carrier frequency in accordance with 5.8.6.2; and if sl-SyncTxDisabled corresponding to the concerned frequency is not configured in RRCReconfiguration or in SIB12: 3> if in RRC_CONNECTED; and if networkControlledSyncTx is configured and set to on; or 3> if networkControlledSyncTx is not configured; and for the concerned frequency syncTxThreshIC is configured; and the RSRP measurement of the reference cell, selected as defined in 5.8.6.3, for NR sidelink communication/discovery transmission is below the value of syncTxThreshIC: 4> transmit sidelink SSB on the frequency used for NR sidelink communication/discovery in accordance with 5.8.5.3 and TS 38.211[ NR; Physical channels and modulation ]  [16], including the transmission of SLSS as specified in 5.8.5.3 and transmission of MasterInformationBlockSidelink as specified in 5.8.9.4.3; 1> else: 2> if sl-SyncFreqList is not included in SL-PreconfigurationNR; or 2> if sl-SyncFreqList is included in SL-PreconfigurationNR, and if none of the frequency(ies) selected as specified in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] is included in the sl-SyncFreqList or the concerned frequency is selected as the synchronisation carrier frequency in accordance with 5.8.6.2; or 2> if sl-SyncFreqList and sl-SyncTxMultiFreq are included in SL-PreconfigurationNR, and if the concerned frequency has been selected for NR sidelink communication transmission as specified in TS 38.321[ NR; Medium Access Control (MAC) protocol specification ]  [3] and included in sl-SyncFreqList; and if the UE has selected a frequency other than the concerned frequency as the synchronisation carrier frequency in accordance with 5.8.6.2; and if sl-SyncTxDisabled corresponding to the concerned frequency is not configured in SL-PreconfigurationNR: 3> for the frequency used for NR sidelink communication/discovery, if syncTxThreshOoC is included in SidelinkPreconfigNR; and the UE is not directly synchronized to GNSS, and the UE has no selected SyncRef UE or the PSBCH-RSRP measurement result of the selected SyncRef UE is below the value of syncTxThreshOoC; or 3> for the frequency used for NR sidelink communication/discovery, if the UE selects GNSS as the synchronization reference source: 4> transmit sidelink SSB on the frequency used for NR sidelink communication/discovery in accordance with 5.8.5.3 and TS 38.211[ NR; Physical channels and modulation ]  [16], including the transmission of SLSS as specified in 5.8.5.3 and transmission of MasterInformationBlockSidelink as specified in 5.8.9.4.3;