30. Power of Government to notify exemption or reduction of tax.

(1) The Government may, by notification, whether prospectively or retrospectively make an exemption, or reduction in rate, in respect of any tax payable under this Act -

(a) on the sale or purchase of any specified goods or class of goods, at all points or at a specified point or points in the series of sales by successive dealers; or

(b) by any specified class of persons, in regard to the whole or any part of their turnover; or

(c) on the sale or purchase of any specified classes of goods by specified classes of dealers in regard to the whole or part of their turnover.

(2) Any exemption from tax, or reduction in the rate of tax, notified under sub-section (1) -

(a) may extend to the whole State or to any specified area or areas therein; or

(b) may be subject to such restrictions and conditions as may be specified in the notification.

(3) The Government may, by notification, cancel or vary any notification issued under sub-section (1).