Administrative Procedures Act; amend to require agency's notice of proposed rule adoption to include cost to the state.

HB 644 requires Mississippi state agencies to include the estimated cost to the state when proposing new rules or significant changes to existing rules. It mandates that agencies provide legislators with copies of rule notices and economic impact statements at no cost, and ensures rules are invalid if agencies fail to comply with these disclosure requirements. The bill directly affects all state agencies drafting new regulations and Mississippi legislators, who gain clearer financial information about proposed rules. This procedural change aims to increase transparency in the rulemaking process by requiring upfront cost disclosures.