Custom Act, 1962
25. Power to Grant Exemption from Duty. –
(1) If the Central Government is satisfied that it is necessary in the public interest so to do, it may, by notification in the Official Gazette, exempt generally either absolutely or subject to such conditions (to be fulfilled before or after clearance) as may be specified in the notification goods of any specified description from the whole or any part of duty of customs leviable thereon.
(2) If the Central Government is satisfied that it is necessary in the public interest so to do, it may, by special order in each case, exempt from payment of duty, for reasons to be stated in such order, any goods, of strategic or secret nature, or for charitable purpose, on which duty is leviable .
(3) An exemption under sub-section (1) or sub-section (2) in respect of any goods from any part of the duty of customs leviable thereon (the duty of customs leviable thereon being hereinafter referred to as the statutory duty) may be granted by providing for the levy of a duty on such goods at a rate expressed in a form or method different from the form or method in which the statutory duty is leviable and any exemption granted in relation to any goods in the manner provided in this sub-section shall have effect subject to the condition that the duty of customs chargeable on such goods shall in no case exceed the statutory duty.
Explanation : "Form or method", in relation to a rate of duty of customs, means the basis, namely, valuation, weight, number, length, area, volume or other measure with reference to which the duty is leviable .
(4) Every notification issued under sub-section (1) shall
(a) unless otherwise provided, come into force on the date of its issue by the Central Government for publication in the Official Gazette;
(b) also be published and offered for sale on the date of its issue by the Directorate of Publicity and Public Relations of the Board, New Delhi.
(5) Notwithstanding anything contained in sub-section (4), where a notification comes into force on a date later than the date of its issue, the same shall be published and offered for sale by the said Directorate of Publicity and Public Relations on a date on or before the date on which the said notification comes into force.