Constitution of India, 1949
287.Exemption from taxes on electricity.-
Save in so far as Parliament may by law
otherwise provide, no law of a State shall impose, or authorize the imposition
of, a tax on the consumption or sale of electricity (whether produced by a
Government or other persons) which is -
(a) consumed by the Government of India, or
sold to the Government of India for consumption by that Government; or
(b) consumed in the construction, maintenance
or operation of any railway by the Government of India or a railway company
operating that railway, or sold to that Government or any such railway company
for consumption in the construction, maintenance or operation of any railway,
and any such law imposing, or authorizing the imposition of, a tax on the sale
of electricity shall secure that the price of electricity sold to the
Government of India for consumption by that Government, or to any such railway
company as aforesaid for consumption in the construction, maintenance or
operation of any railway, shall be less by the amount of the tax than the price
charged to other consumers of a substantial quantity of electricity.