US HB4624

Amends the Professional Boxing Safety Act of 1996 to create a voluntary alternative regulatory framework for "unified boxing organizations" (UBOs) that contract directly with boxers and organize matches under unified rules

Establishes enhanced medical requirements including mandatory brain health exams after knockouts, supplemental physical exams for boxers age 40+ (chest X-ray, metabolic panel, urinalysis), and requires at least 2 ambulances and 2 ringside physicians at UBO matches

Requires UBOs to provide boxers with training/rehabilitation facilities, insurance covering training injuries, a medical coordinator, and a comprehensive anti-doping program with independent third-party testing

Sets boxer contract protections including a $200 minimum payment per round, maximum 6-year contract length, at least 1 fight every 6 months (or equivalent compensation), and prohibits blocking communication with other promoters during the final 30 days of a contract

Mandates drug testing for all title bouts and at least 50% of other matches, requires judges and referees to be certified by state commissions or the Association of Boxing Commissions, and imposes criminal penalties of up to 1 year imprisonment or $20,000 fine for willful violations