3. After regulation 4A, insert—
(1) Gamma–butyrolactone and 1,4–butanediol are excepted from sections 3(1) (import and export), 4(1) (production and supply) and 5(1) (possession) of the Act save where a person imports, exports, produces, supplies or offers to supply either substance, or has either substance in his possession, knowing or believing that it will be used for the purpose of human ingestion whether by himself or another person other than as a flavouring in food.
(2) In this regulation references to gamma–butyrolactone and 1,4–butanediol include—
(a)any stereoisomeric form of gamma–butyrolactone or 1,4–butanediol;
(b)any salt of gamma–butyrolactone, 1,4–butanediol or of a substance specified in sub–paragraph (a) of this paragraph; and
(c)any preparation or other product containing gamma–butyrolactone, 1,4–butanediol or a substance specified in sub–paragraph (a) or (b) of this paragraph.”