SECTION 1. Section 31 of Chapter 94C of the General Laws is hereby amended by striking subsection (a)(4) under the Class B schedule and substituting the following new subsection:-             

Subsection (f) Unless specifically excepted or unless listed in another schedule, any of the following substances whether produced directly or indirectly by extraction from substances of vegetable origin, or independently by means of chemical synthesis, or by a combination of extraction and chemical synthesis:

Coca leaves, and the salts, optical and geometric isomers and salts of isomers, excluding coca leaves and extracts of coca leaves from which cocaine, ecgonine, and derivaties of ecgonine or their salts have been removed; of cocaine, ecgonine, pseudococaine, allococaine and pseudoallococaine, their derivatives, their salts, isomers and salts of their isomers; or any compound, mixture, or preparation which contains any quantity of any of the substances referred to in this paragraph.

SECTION 2. This act shall take effect upon passage.