The Los Angeles City Council voted on Tuesday to pass a law that requires companies seeking contracts with the city to disclose any ties to the National Rifle Association (NRA).

The Los Angeles Times reported that council member Mitch O'Farrell crafted the ordinance in response to the wave of mass shootings in the U.S. The councilman described the NRA as a "roadblock" to gun law reforms.

The measure passed on Tuesday with a 14-0 vote.

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Attorneys for the NRA have threatened to sue over the ordinance, the Times reported. One lawyer for the organization told the news outlet that the law could prompt those with ties to the organization to drop their affiliation out of fear it could cost them business.

The NRA did not immediately respond to a request for comment.

The Los Angeles Times reported that the city's attorney informed O'Farrell that the city is on "firm legal ground" with the ordinance.

The NRA has come under mounting scrutiny, particularly from Democratic lawmakers, in the wake of recent mass shootings, including one last year that left 12 people dead in a suburb of Los Angeles.