Without prejudice to section 2(6)( a) of the Superannuation (Miscellaneous Provisions) Act (Northern Ireland) 1969 [1969 c.7] (application of certain provisions in respect of President of the Industrial Court or of the Industrial Tribunals), this Part shall apply in relation to service by a person as aF2 Social Security CommissionerF3 remunerated by means of a salary; but in its application to such a Commissioner this Part shall have effect subject to paragraph 7(3) and (4) of Schedule 10 to the Social Security (Northern Ireland) Act 1975 M1, “serve” and “service” being construed accordingly.]

For the purpose of the calculation of any derivative benefit under this Part, in respect of a person who is eligible for a pension for service in any office, there shall be left out of account any period of service during which an election under paragraph 7A of Schedule 10 to the Social Security (Northern Ireland) Act 1975 was in force in respect of that person.