Declaratory amendments like “explanation “ inserted to a section are retrospective in nature

(i)    CIT, Bombay v. M/s Gwalior Rayon Silk Manufacturing Co. Ltd. [1992] 3 SCC 326

(ii)   Commissioner of Income Tax v. M/s Alps Theatre AIR 1967 SC 1437 = [1967] 3 SCR 181

(iii)     Commissioner of Income Tax-I, Ahmedabad v. Gold Coin Health Food Private Limited [2008] 9 SCC 622