1[33B. Application of Chapter IVA.--This Chapter shall apply only to 2[Ayurvedic, Siddha and Unani] drugs.] 1. Ins. by Act 13 of 1964, s. 26 (w.e.f. 1-2-1969). 2. Subs. by Act 68 of 1982, s. 2, for certain words (w.e.f. 1-2-1983).