54. (1) A person referred to in section 53 who, immediately before the appointed day, was a member of a relevant superannuation scheme or the Single Public Service Pension Scheme shall, on the appointed day, continue to be a member of such scheme in accordance with its terms and conditions.

(2) Nothing in this section shall prevent a relevant superannuation scheme being varied in accordance with its terms and conditions.

(3) In this section “relevant superannuation scheme” means, as the case may be—

(a) the Education Sector Superannuation Scheme 2015 or the ESSS 2015, or

(b) the Education Sector Superannuation Scheme referred to in Article 3(4) of the Education Sector Superannuation Scheme (Transfer of Departmental Administration and Ministerial Functions) Order 2001 (S.I. No. 14 of 2001), in so far as that scheme has not been revoked by the scheme referred to in paragraph (a).