S. 90 :Double taxation relief-Elimination of double taxation-Review petition dismissed against order of Supreme Court that a notification under section 90(1) is a mandatory condition to give effect to a DTAA, or any protocol changing its terms or conditions, which has effect of altering existing provisions of law and thus, for a party to claim benefit of a same treatment clause, based on entry of DTAA between India and another state which is member of OECD, relevant date would be entering into treaty with India and not a later date, when, after entering into DTAA with India, such country becomes an OECD member, in terms of India’s practice-DTAA-India-France [R. 128, Art. 10, 13]