If, as regards an agreement to transfer securities to B or his nominee, tax is charged under section 87 above and it is proved to the Board's satisfaction that at a time after the expiry of the period of two months (beginning with the relevant day, as defined in section 87(3)) but before the expiry of the period of six years (so beginning) the conditions mentioned in section 87(4) and (5) have been fulfilled, the following provisions of this section shall apply.

If any of the tax charged has been paid, and a claim for repayment is made within the period of six years mentioned in subsection (1) above, the tax paid shall be repaid; and where the tax paid is not less than £25 it shall be repaid with interest on it at the appropriate rate from the time it was paid.

To the extent that the tax charged has not been paid, the charge shall be cancelled by virtue of this subsection.

In subsection (2) above "the appropriate rate" means 11 per cent, per annum or such other rate as the Treasury may from time to time specify by order.

The power to make an order under this section shall be exercisable by statutory instrument subject to annulment in pursuance of a resolution of the House of Commons.