The Public Sector Transfer Network was set up based on Section 4 of the Superannuation and Pensions Act, 1963. Section 1 (a) of this Act states, "The Minister may by regulations designate organisations as approved organisations for the purposes of this section." Accordingly for a public sector body to join the Network it must be listed in a Statutory Instrument. Since the Network was constituted over 200 bodies have joined and over 50 S.I.s have been signed. The 1963 Act is silent on provisions for organisations to leave the Network.