Mass. Gen. Laws ch. 94C § 32L
Notwithstanding any general or special law to the contrary, possession of 2 ounces or less of marihuana shall only be a civil offense, subjecting an offender who is 18 to 21 years of age, inclusive, to a civil penalty of one hundred dollars and forfeiture of the marihuana, but not to any other form of criminal or civil punishment or disqualification. An offender under the age of eighteen shall be subject to the same forfeiture and civil penalty provisions, provided he or she completes a drug awareness program which meets the criteria set forth in Section 32M of this Chapter. The parents or legal guardian of any offender under the age of eighteen shall be notified in accordance with Section 32N of this Chapter of the offense and the availability of a drug awareness program and community service option. If an offender under the age of eighteen fails within one year of the offense to complete both a drug awareness program and the required community service, the civil penalty may be increased pursuant to Section 32N of this Chapter to one thousand dollars and the offender and his or her parents shall be jointly and severally liable to pay that amount.
Except as specifically provided in section 24I of chapter 90, chapter 94G and chapter 387 of the acts of 2008, neither the Commonwealth nor any of its political subdivisions or their respective agencies, authorities or instrumentalities may impose any form of penalty, sanction or disqualification on an offender for possessing 2 ounces or less of marihuana. By way of illustration rather than limitation, possession of 2 ounces or less of marihuana shall not provide a basis to deny an offender student financial aid, public housing or any form of public financial assistance including unemployment benefits, to deny the right to operate a motor vehicle or to disqualify an offender from serving as a foster parent or adoptive parent. Information concerning the offense of possession of 2 ounces or less of marihuana shall not be deemed "criminal offender record information," "evaluative information," or "intelligence information" as those terms are defined in Section 167 of Chapter 6 of the General Laws and shall not be recorded in the Criminal Offender Record Information system.
As used herein, "possession of 2 ounces or less of marihuana" includes possession of 2 ounces or less of marihuana or tetrahydrocannabinol and having cannabinoids or cannibinoid metabolites in the urine, blood, saliva, sweat, hair, fingernails, toe nails or other tissue or fluid of the human body. Nothing contained herein shall be construed to repeal or modify existing laws, ordinances or bylaws, regulations, personnel practices or policies concerning the operation of motor vehicles or other actions taken while under the influence of marihuana or tetrahydrocannabinol, laws concerning the unlawful possession of prescription forms of marihuana or tetrahydrocannabinol such as Marinol, possession of more than 2 ounces of marihuana or tetrahydrocannabinol, or selling, manufacturing or trafficking in marihuana or tetrahydrocannabinol. Nothing contained herein shall prohibit a political subdivision of the Commonwealth from enacting ordinances or bylaws regulating or prohibiting the consumption of marihuana or tetrahydrocannabinol in public places and providing for additional penalties for the public use of marihuana or tetrahydrocannabinol.
Mass. Gen. Laws ch. 94C, § 32L