Section 124(2) in The Drugs and Cosmetics Rules, 1945
(2)For other drugs:(a)The standards for identity, purity and strength shall be those as may be specified in the edition of the official pharmacopoeia, for the time being in force, of any country to which the drug claims to comply with.(b)In case the standards for identity, purity and strength for drugs are not specified in the edition of such official pharmacopoeia, for the time being in force, but are specified in the edition immediately preceding, the standards for identity, purity and strength shall be those occurring in such immediately preceding edition of such official pharmacopoeia to which the drug claims to comply with.(c)For drugs for which standards are not included in the edition of the official pharmacopoeia, for the time being in force, of any country or in its edition immediately preceding, but included in the official compendia of drugs standards, namely:-The British Pharmaceutical Codex or the National Formulary of the United States, for the time being in force, to which the drug claims to comply with.]
