Section 28A(1) in Kerala General Sales Tax Rules, 1963
(1)A dealer who purchases goods from another dealer in circumstances in which the sale to him is to be deemed to be in the course of export under sub-section (3) of Section 5 of the Central Sales Tax Act, 1956 (Central Act 74 of 1956) shall furnish to the selling dealer the original and duplicate portions of the "declaration in form H prescribed under the Central Sales Tax (Registration and turnover) Rules, 1957, duly filled in and signed by him or by any responsible person duly authorized by him in this behalf and shall retain the counterfoil.