15. (1) Subject to section 48 of the Public Service Pensions (Single Scheme and Other Provisions) Act 2012, a pensionable public servant who—

(a) is not a member of the Single Public Service Pension Scheme, and

(b) is appointed under section 13 or 14 to be a member of staff of a technological university,

shall, on his or her appointment to the technological university concerned, become and be a member of the Education Sector Superannuation Scheme 2015 or the ESSS 2015 (S.I. No. 290 of 2015) in accordance with its terms and conditions.

(2) Nothing in this section shall prevent the Education Sector Superannuation Scheme 2015 or the ESSS 2015 being varied in accordance with its terms and conditions.