The U.S. Commerce Department’s Bureau of Industry and Security (BIS) said on Friday it will revoke authorizations that allowed select foreign semiconductor makers to ship U.S. chipmaking equipment and technology to China without licenses. The move ends a Biden-era expansion of the Validated End-User program that exempted companies such as Samsung Electronics and SK Hynix from normal export control rules. Firms will now have 120 days to apply for licenses covering their China-based operations.

BIS said it intends to approve applications needed to keep existing fabs in China running but does not plan to authorize capacity expansions or technology upgrades.