Customs exemption extension for defence procurement program extends prior notification validity under Customs Act authority. The Central Government, exercising powers under the Customs Act and for public interest, amends the principal notification by substituting a later expiry date in the Explanation to S. No. 17 in the Table, thereby extending the validity of the Customs exemption for the Defence Ministry's SAMYUKTA programme; the amendment forms part of the sequence of modifications to the 1996 principal notification published in the Gazette.