Constitution of India, 1949
298.Power to carry on trade, etc.-
The executive power of the Union and of each
State shall extend to the carrying on of any trade or business and to the
acquisition, holding and disposal of property and the making of contracts for
any purpose:
Provided that –
(a) the said executive power of the Union
shall, in so far as such trade or business or such purpose is not one with
respect to which Parliament may make laws, be subject in each State to
legislation by the State; and
(b) the said executive power of each State
shall, in so far as such trade or business or such purpose is not one with
respect to which the State Legislature may make laws, be subject to legislation
by Parliament.