The National Organization for Marriage (NOM) on Friday put its muscle behind an effort to repeal California's first-in-the-nation law that gives transgender K-12 students certain rights.

The new law requires public schools to allow transgender students access to the restroom and locker room of their choice. Those students can also decide what sports they want to play.

Supporters said the law will help reduce discrimination faced by transgender students.

“NOM is urging its members in California to assist in the effort to gather nearly 505,000 required voter signatures to place the repeal on the November 2014 ballot, suspending the law until Californias can vote to reject it,” NOM said in a press release.

Referring to AB1266 as the “bathroom law,” NOM President Brian Brown said that it is “a horrible attempt by activist to strip society of all gender and uses children as a weapon in their culture war.”

“The National Organization for Marriage fully supports the efforts of the Privacy For All Students coalition to repeal this dangerous law. Opening our most vulnerable areas at school including showers, bathrooms, and changing rooms to members of the opposite sex is politically-correct madness that risks the privacy and security of our children and grandchildren,” Brown added.

Frank Schubert, NOM's national political director, heads Privacy For All Students, the campaign to repeal the law.