21. Notwithstanding anything contained in these Regulations—
(a)the whole of the contributions at the rates specified in Schedule 1, Table A, payable to the Scheme by a member of the Corps of Specialists; and
(b)such part of the contributions payable to the Scheme by persons employed by the Minister on technical assistance terms as may be approved by the Treasury,
shall be payable by the Minister:
(a)this regulation shall not apply to contributions payable under regulation 15 (contributions after leaving overseas service); and
(b)where a member of the Corps of Specialists elects to have regulation 24 or paragraph (4) of regulation 29 or both such regulation and such paragraph applied to him, he shall himself pay the difference between the rates of contributions specified in Schedule 1, Table A, and the rates of contributions specified in Schedule 1, Table B, Schedule 2, Table A, or Schedule 2, Table B, as the case may be.