21. Where any person to whom this part of these regulations applies is admitted after the date of transfer as a contributor to the Superannuation Suspense Account or as a member of the Cable and Wireless Pension Fund under arrangements made between him or any staff association on his behalf and the Postmaster-General, regulations five, six, seven, eight and eleven shall apply in relation to him, and paragraphs (1) and (2) of regulation eighteen shall cease to apply to him.