Criminal Offenses - As introduced, creates an offense to knowingly inhale, ingest, use, or possess any compound, liquid, gas, or chemical that contains nitrous oxide. - Amends TCA Title 39; Title 57, Chapter 7; Title 63 and Title 67, Chapter 4, Part 10.

HB 1539 makes it a Class A misdemeanor to knowingly inhale, ingest, use, or possess nitrous oxide ("laughing gas") or amyl nitrite ("poppers"), except for medical use, food service (as a propellant), manufacturing, or use by adults 21+ for personal or automotive purposes. The bill includes specific exceptions, such as prescriptions from medical professionals and food industry use, but labels or added flavors create a presumption against these exceptions. Businesses selling these substances face penalties, including 30-day license suspensions for first violations and revocation for second offenses. The law would take effect July 1, 2026, if passed.