Introductory Text1.Citation, commencement, interpretation and extent2.Amendment to the 2001 Regulations3.After regulation 4A, insert— Exceptions for gamma–butyrolactone and 1,4–butanediol (1) Gamma–butyrolactone and 1,4–butanediol are excepted from sections 3(1) (import.4.(1) In Schedule 1 (which specifies controlled drugs subject to.SignatureExplanatory Note