s 9 Tax on purchases
(1) Tax shall be charged, subject to and in accordance with the provisions of this Act, on the wholesale value of all chargeable goods bought under chargeable purchases. (2) A chargeable purchase is a purchase made from a wholesale merchant or manufacturer who is required by this Act to be registered, selling by wholesale, not being— (a) a purchase of goods by a registered wholesale merchant as stock for his business ; or (b) a purchase of goods by a registered manufacturer as materials. (3) A purchase is a chargeable purchase only so far as it relates to goods in the United Kingdom, that is to say— (a) in the case of a purchase of ascertained goods, goods bought under the purchase which are in the United Kingdom at the time of the purchase ; (b) in the case of a purchase of unascertained goods, goods appropriated to the purchase which are in the United Kingdom at the time of the appropriation. (4) Tax chargeable in respect of any goods by virtue of a purchase becomes due on the delivery of the goods under the purchase, and the seller under the purchase is accountable for it.