7. Time of sale of goods

(1) Notwithstanding anything contained in the Sale of Goods Act, 1930 (Central Act 3 of 1930), for the purpose of this Act, and subject to sub-section (2), the sale of goods shall be deemed to have taken place at the time of transfer of title or possession or incorporation of the goods in the course of execution of any works contract whether or not there is receipt of payment:

Provided that where a dealer issues a tax invoice in respect of such sale within fourteen days from the date of the sale, the sale shall be deemed to have taken place at the time the invoice is issued.

(2) Where, before the time applicable in sub-section (1), the dealer selling the goods issues a tax invoice in respect of such sale or receives payment in respect of such sale, the sale shall, to the extent that it is covered by the invoice or payment, be deemed to have taken at the time the invoice is issued or the payment is received.

(3) The Commissioner may on an application of any dealer exempt such dealer subject to such conditions as he may specify, from the time specified in sub- section (1).