10. At the end of regulation 43(1) of the principal Regulations there shall be added the following proviso:—
“Provided that the sum payable to a member whose application for a refund of contributions under this regulation was received by the Secretary of State before 6th April 1988 shall be reduced in respect of tax chargeable only by the sum by which it would have been reduced if the payment had been made by the Secretary of State on 5th April 1988.”.