(1)(a) In determining the purchase price liable to tax, the amount relating to the purchases made within the local area from a registered dealer doing business in the same local area shall be deducted;
(b) Every dealer dealing in the scheduled goods and who is not liable to tax in respect of such scheduled goods by reason of his not being the person causing entry of the scheduled goods into the local area for consumption, use or sale therein shall furnish to the assessing authority a declaration in Form-24 obtained from the dealer from whom he purchased the scheduled goods in the same local area and for this purpose the seller shall issue the declaration to the buying dealer.
(c) The declarations issued in Form-24 shall be serially machine numbered for each year and the dealer issuing the same shall maintain a day-to-day account thereof in a register in Form-25.
(2) All amounts received from the seller in respect of the goods returned to them by the dealer shall be deducted from the purchase price liable to tax, provided that, the goods were returned within a period of six months from the date of delivery of the goods and the accounts show the date on which the goods were returned and the date on which and the amount for which the refund was received.
(3) In determining the value of goods liable to tax, the value of goods purchased or received from outside the local area but subsequently sent out of the local area otherwise than by way of sale shall be deducted, provided that the goods are sent out of the local area - 6 - within a period of six months from the date of entry of such goods into the local area and entries are made in the stock register in the manner specified in sub-rule (5) of rule 15.