An embodiment of the present disclosure provides a method of performing sidelink (SL) communication by a first apparatus. The method includes transmitting a first sidelink control information (SCI) to a second apparatus through physical sidelink control channel (PSCCH), and transmitting a second SCI to the second apparatus through physical sidelink shared channel (PSSCH) related to the PSCCH, wherein the first SCI includes information for resource of the second SCI.
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