Methamphetamine; revise penalty for simple possession of certain amounts.

Added mandatory drug treatment program requirements for first and second methamphetamine possession convictions, with court discretion to find treatment inappropriate in writing.

Added mandatory drug treatment for second methamphetamine offense within five years (30 days minimum) and felony charges for third or subsequent offenses within five years.

Added prohibition on physicians prescribing Schedule II stimulants for obesity or weight loss treatment.

Defined 'dosage unit' as a tablet, capsule, or milliliter for liquid solutions, with special provisions for LSD.

Created a private nonpublic record system for marijuana convictions that courts must forward to the Mississippi Bureau of Narcotics, expunged after two years and not constituting a criminal record.

Added misdemeanor penalty for marijuana or synthetic cannabinoid possession in motor vehicles (1-30 grams marijuana or 1-10 grams synthetic cannabinoids) with fines up to $1,000 or 90 days in county jail.

Added aggravated trafficking provisions for Schedule I or II substances (200+ grams) with mandatory 25-year minimum sentences.

Added sentence mitigation provisions allowing courts to reduce mandatory prison sentences by up to 25% under specific circumstances.

Established July 1, 2029 as the repeal date for methamphetamine possession penalties in certain weight ranges.

Modified sentencing thresholds for controlled substances, creating new tiers based on weight and dosage units with varying penalties for different schedules.