California state lawmakers have passed legislation that would ban most law enforcement officers from covering their faces while carrying out operations, a response to recent immigration raids in Los Angeles.

It is the first such bill to be approved by a state legislature, though Democrats in Congress and lawmakers in several states, including Tennessee, Michigan, Illinois, New York, Massachusetts, and Pennsylvania, have introduced similar proposals calling for mask bans for law enforcement officers.

But even if the governor signs the measure into law, it’s unclear whether the state could enforce it on the federal agents who have been carrying out those raids.