Section: 5.8.6.3 Sidelink communication transmission reference cell selection
Content: A UE capable of NR sidelink communication/discovery that is configured by upper layers to transmit NR sidelink communication/discovery shall: 1> for the frequency used to transmit NR sidelink communication/discovery, select a cell to be used as reference for synchronization in accordance with the following: 2> if the frequency concerns the primary frequency: 3> use the PCell or the serving cell as reference; 2> else if the frequency concerns a secondary frequency: 3> use the concerned SCell as reference; 2> else if the UE is in coverage of the concerned frequency: 3> use the DL frequency paired with the one used to transmit NR sidelink communication/discovery as reference; 2> else (i.e., out of coverage on the concerned frequency): 3> use the PCell or the serving cell as reference, if needed;