By Vijay Kumar

In absence non obstante clause allowing prevailing of Narcotic Drugs and Psychotropic Substances Act, 1985 over Evidence Act, 1872 such statements could only be treated as previous statements under Section 145 ibid and not as substantive evidence

Retrospective amendment of excise rules empowering Revenue to recover duty - Even in such a case, demand has to be within limitation prescribed under Section 11A of Central Excise Act, 1944, in absence of non-obstante clause in amendment

Although a non obstante clause is used in Article 253 of the Constitution of India, it only explains and provides for the legislative competence of the Parliament for the whole or any part of the territory for the purpose of implementing any treaty or agreement with any other country or any decision made at any international conference etc. If the Parliament or the State Legislature are competent to lay down the guidelines and leave the implementation of the guidelines to the rule making authority, such a law cannot be held to be ultra vires because of a non obstante clause in Article 253.