First responders; authorize follow-up drug testing before certification.

HB 564 creates a process for Mississippi first responders (firefighters, law enforcement officers, and public EMS personnel with 10+ years of service) who test positive for drugs in an initial urinalysis. It requires employers to offer a follow-up hair follicle test within 5 days if the employee contests the results within 2 business days. The first responder pays for the follow-up test initially but gets reimbursed if it returns negative, which would overturn the initial positive result and restore their position. If the follow-up test is positive, the employee bears the cost and faces disciplinary action. This bill establishes clear procedural steps for drug testing disputes but does not change drug policy or employment standards.