HB 5521 allows certain businesses and venues, including amusement parks, live music venues, and sports venues, to maintain and administer opioid antagonists like Naloxone for emergency overdose treatment. The bill establishes training requirements for employees or volunteers who administer the drug, outlines inventory management procedures, and provides civil and criminal immunity for individuals acting in good faith while administering the medication. The executive commissioner is tasked with developing regulations to govern these policies​.