Customs exemption amendment: Cellulose acetate sheets and strips granted ad valorem concession under revised notification. An amendment inserts S. No. 6A in the Table to Notification No. 88/87-Customs to grant an ad valorem exemption for Cellulose Acetate Sheets and Strips, the Central Government acting under sub-section (1) of section 25 of the Customs Act, 1962, and stating the change is made in the public interest.