This article provides background on the seismic design of cross-laminated timber (CLT) shear wall systems following ASCE 7-22 Minimum Design Loads and Associated Criteria for Buildings and Other Structures and ANSI/AWC Special Design Provisions for Wind and Seismic (SDPWS) 2021 Edition. The SDPWS is referenced in the 2021 International Building Code (IBC), and both SDPWS and ASCE 7-22 will be referenced in the 2024 IBC.