Sch 6 para B1
(1) The Treasury must, by order, make provision about the valuation of supplies on the flat-rate basis. (2) In particular, an order under this paragraph must— (a) set out a table (“the base valuation table”) by reference to which the value of supplies is to be determined until such time as the base valuation table is replaced under paragraph (b), (b) provide that at regular intervals— (i) the amounts specified in the base valuation table are to be revalorised by the Commissioners in accordance with the order, and (ii) a table (an “updated valuation table”) containing the revalorised amounts is to take effect (and replace any existing table) in accordance with the order, and (c) require the Commissioners to publish any updated valuation table before it takes effect, together with a statement specifying the date from which it has effect. (3) An order under this paragraph may provide for the base valuation table and any updated valuation table to be implemented or supplemented by either or both of the following— (a) rules set out in the order which explain how the value is to be determined by reference to any table; (b) notes set out in the order with respect to the interpretation or application of any table or any rules or notes. (4) Rules or notes may make different provision for different circumstances or cases.