(1)References in section 401 to the market value of a security given or received in exchange for another are references to its market value at the time of the exchange.
(2)The Treasury may by regulations make provision for the purposes of section 401 and this section as to the way of determining the market value at any time of—
(a)any strip, or
(b)any other gilt-edged security.
(3)The regulations may make—
(a)different provision for different cases, and
(b)incidental, supplemental, consequential and transitional provision and savings.