Gov. Gavin Newsom (D-CA) signed a new bill into into law on Saturday that bans most federal, local, and out-of-state law enforcement officers from wearing face coverings.

The bill, dubbed the No Secret Police Act, prohibits most law enforcement operating in the state, including U.S. ICE agents, from masking while on the job. It includes a few exemptions, such as for SWAT teams and undercover police work, and still allows officers to wear medical masks and gas masks, if necessary.

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Penalties for violating the law include either an infraction or misdemeanor, and apply to officers who committed an “assault, battery, false imprisonment, false arrest, abuse of process, or malicious prosecution” while covering their face, a press release from Democratic state Sen. Scott Wiener, who headed the bill, said.

The new piece of legislation was part of a slate of others signed by Newsom this weekend, most of which are designed to clamp down on the Trump administration‘s immigration operations in the state.

Those include one bill requiring officers to provide identification while conducting operations, two others prohibiting ICE agents from entering schools or health facilities without a warrant, and another requiring schools to notify parents and teachers if ICE agents are on site.

At a press conference before the bill signing, Newsom taunted ICE agents, who have been wearing masks on patrols to protect their identities.

“To ICE, unmask. What are you afraid of?” he said. “You’re gonna do enforcement? Provide an ID.”

Newsom’s press office also appeared to taunt Department of Homeland Security Secretary Kristi Noem, posting before the bill signing ceremony that she “is going to have a bad day today.”

The post met with backlash from numerous Trump administration officials, including DHS Assistant Secretary Tricia McLaughlin, who called it a “threat.”

“This is ugly, [Gavin Newsom]. Your keyboard warrior team may hide behind their laptops and spew this kind of vitriol but you would never have the guts to say this to her face,” she said.

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In response, Los Angeles’s top federal prosecutor, Bill Essayli, referred Newsom’s comments to U.S. Secret Service.

“We have zero tolerance for direct or implicit threats against government officials. I’ve referred this matter to [Secret Service] and requested a full threat assessment,” he said in a statement.