Kansas Attorney General Derek Schmidt on Friday filed a federal lawsuit challenging the Biden administration’s new federal vaccine mandate for private employers with more than 100 employees.

The mandate requires that employees either be vaccinated or receive weekly testing for COVID-19 and would apply to all private-sector employers with 100 or more employees.

According to a release, Schmidt joined six other state attorneys general in filing a petition with the U.S. Court of Appeals for the 6th Circuit, following through on his previous warnings about the doubtful legality of using OSHA emergency powers to mandate employee vaccinations or testing.

Friday’s filing asks the court to review the legality of the new mandate, arguing that OSHA lacks the statutory and constitutional authority to issue it. The attorneys general also plan to file a motion asking the court to stay the mandate pending the outcome of the case, the release from Schmidt’s office said.

“Nothing in federal law gives OSHA this kind of far-reaching authority,” Schmidt said. “Businesses that do not comply would be subject to steep fines. And to make matters worse, state and federal governments have just announced they will stop paying the cost of testing for businesses, shifting that cost onto businesses themselves. The net effect of this overreaching federal mandate is to discourage private businesses from employ unvaccinated workers by making it more costly, once again threatening the livelihood of many Kansas workers and businesses and promising more disruptions to supply chains nationwide.”

This case is the second filed by Schmidt challenging the federal government’s recent attempts to mandate vaccination