purposes of the Act. In exercise of the powers conferred by sub-section 3,4, and 5 of Section 13 of the Central Sales Tax, 1956, the Government of Karnataka made the Central Sales Tax (Karnataka) Rules, 1957. Under rule 6(b) (ii) of the Karnataka Rules, the State Government has prescribed as to the procedures to be followed and the documents to be produced for claiming concessional rate of tax under Section 8(4) of the Central Sales Tax Act. Thus, the dealer has to strictly follow the procedure and the Rule 6 (b)(ii) and produce the relevant materials required under the said rule. Without producing the specified documents as prescribed thereunder a dealer cannot claim the benefits provided under Section 8 of the Act. Therefore, we are of the opinion that the requirements contained in Rule 6 (b)(ii) of the Central Sales Tax (Karnataka) Rules, 1957 are mandatory. Section 12(1)(2) and (3) of the Central Sales Tax (R&T) Rules, 1957 provides that the registered dealer is required to file the declaration and the certificate referred to in Section 8(4) in Form-C and D respectively. Form-C is a declaration divided into three parts. All the three parts are identical, the first part of the form being the counter foil and the second part being the duplicate and the third part being the original. The counter foil is to be retained by the purchasing dealer. The original is to be filed before the Assessing Officer by the selling dealer to claim the concessional rate. The duplicate is to be retained by the selling dealer. If the C-Form or the original part of it is lost whilst in the custody of the purchasing dealer or in transit, the purchasing dealer shall have to furnish an indemnity bond for the same as fixed by the concerned authority. If the original part of C-Form is lost by the selling dealer whilst it is in his custody or in transit, the selling dealer shall furnish an indemnity bond as fixed by the concerned authority and follow the procedure prescribed under Rule 12(3).