“63. At the outset, we may state that on account of globalization and socio-economic problems (including income disparities in our economy) the power of Delegation has become a constituent element of legislative power as a whole. However, as held in the case of Indian Express Newspaper v. Union of India reported in (1985) 1 SCC 641 at page 689, subordinate legislation does not carry the same degree of immunity which is enjoyed by a statute passed by a competent Legislature. Subordinate legislation may be questioned on any of the grounds on which plenary legislation is questioned. In addition, it may also be questioned on the ground that it does not conform to the statute under which it is made. It may further be questioned on the ground that it is inconsistent with the provisions of the Act or that it is contrary to some other statute applicable on the same subject matter. Therefore, it has to yield to plenary legislation. It can also be questioned on the ground that it is manifestly arbitrary and unjust. That, any inquiry into its vires must be confined to the grounds on which plenary legislation may be questioned, to the grounds that it is contrary to the statute under which it is made, to the grounds that it is contrary to other statutory provisions or on the ground that it is so patently arbitrary that it cannot be said to be inconformity with the statute. It can
