(1)F7Subject to the following provisions [F6and to the provisions of section 29AF6] of this section ..., VAT shall be charged at the rate of [F820 per centF8] and shall be charged—
(a)on the supply of goods or services, by reference to the value of the supply as determined under this Act; and
F9(b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(c)F10on the importation of goods ..., by reference to the value of the goods as determined under this Act.
F11(1A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F11(1B). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F12(1C). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(2)The Treasury may by order increase or decrease the rate of VAT for the time being in force [F13under this sectionF13] by such percentage thereof not exceeding 25 per cent. as may be specified in the order, but any such order [F14that has not previously expired or been revokedF14] shall cease to be in force at the expiration of a period of one year from the date on which it takes effect, unless continued in force by a further order under this subsection.
(3)In relation to an order made under subsection (2) above to continue, vary or replace a previous order, the reference in that subsection to the rate for the time being in force [F13under this sectionF13] is a reference to the rate which would be in force if no order under that subsection had been made.