Circular No. 143/54/95-CX It has been represented to the Board that the existing description of the kit at serial number 185 of Heading A of the Schedule under the notification is slightly different from the description of the same kits which appeared at serial number 107 of Heading A of the Schedule under notification No. 208/81-Customs, which has resulted in restricting the scope of exemption to only those kits which are based on radioactive elements. The exemption on other immunoassay kits is reportedly not a available.