1. Short title This Act may be cited as the Stopping Unconstitutional Background Checks Act . 2. Prohibition on use of Federal funds to finalize, implement, or enforce proposed ATF Rule 2022R–17, entitled Definition of Engaged in the Business as a Dealer in Firearms No Federal funds may be used to finalize, implement, or enforce the rule proposed by the Bureau of Alcohol, Tobacco, Firearms, and Explosives, entitled Definition of Engaged in the Business as a Dealer in Firearms , in the notice of proposed rulemaking 2022R–17, signed by the Attorney General on August 30, 2023, or any substantially similar rule.