Local and federal agents, including immigration officials, may not wear masks while conducting official business

California will be the first state to ban most law enforcement, including federal immigration agents, from covering their faces while conducting official business under a bill signed by the state’s governor, Gavin Newsom, on Saturday.

The ban is California’s direct response to a recent series of immigration raids in Los Angeles where federal agents wore masks while making mass arrests. The raids prompted protests and led Donald Trump to deploy national guard troops and marines to the city.

It’s unclear how – or whether – the state can enforce the ban on the federal agents who have been carrying out those raids. A homeland security official called the legislation “despicable” in a statement this week, adding that the ban would only put officers in danger.