(Fox News) Groups trying to overturn a new California law allowing transgender students to choose public school restrooms and sports teams that correspond with their expressed genders have filed a lawsuit claiming state officials are unfairly refusing to count signatures seeking a referendum.

Sacramento-based Privacy For All Students, a coalition of conservative groups, filed the lawsuit Thursday against the secretary of state and two counties.

It says a courier delivered signatures collected in Tulare ahead of a deadline of Nov. 10, but offices were closed early before the three-day weekend. In Mono County, a courier dropped the signatures in a county mail slot a day before the deadline, but workers did not return to their jobs until the deadline had passed, according to the plaintiffs.

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