Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 94C, § 4

(1) the compound, mixture, or preparation contains one or more active medicinal ingredients not having a depressant or stimulant effect on the central nervous system, and

(2) such ingredients are included therein in such combinations, quantity, proportion, or concentration as to vitiate the potential for abuse of the substances which do have a depressant or stimulant effect on the central nervous system, and

(3) the compound, mixture, or preparation has been similarly excepted under the provisions of the Federal “Comprehensive Drug Abuse, Prevention and Control Act of 1970”, or any amendment thereof.  1

Such regulation shall state the weight of the controlled substance per fluid ounce, or if a solid or semi-solid preparation the weight in the avoirdupois amounts, and if the metric system is used, the weight in grams per hundred cubic centimeters in the case of a fluid, or the weight per gram in the case of a solid or semi-solid preparation.

The commissioner shall by regulation modify, rescind or revoke an exception whenever it has been modified, rescinded or revoked under the provisions of the Federal Comprehensive Drug Abuse, Prevention and Control Act of 1970 or any amendment thereof.  1