(1)A transfer of value is an exempt transfer to the extent that the value transferred by it is attributable to property—
(a)which, on a claim made for the purpose, is designated by the Treasury under section 31 below, and
(b)with respect to which the requisite undertaking described in that section is given by such person as the Treasury think appropriate in the circumstances of the case.
(2)A transfer of value exempt with respect to any property under this section or under section 76 of the [1976 c. 40.] Finance Act 1976 is referred to in this Act as a conditionally exempt transfer of that property.
(3)Subsection (1) above shall not apply to a transfer of value other than one which under section 4 above a person makes on his death unless—
(a)the transferor or his spouse, or the transferor and his spouse between them, have been beneficially entitled to the property throughout the six years ending with the transfer, or
(b)the transferor acquired the property on a death on the occasion of which there was a transfer of value under section 4 above which was itself a conditionally exempt transfer of the property.
(4)Subsection (1) above does not apply to a transfer of value to the extent to which it is an exempt transfer under section 18 or 23 above.