15. In regulation S2–
(a)in paragraph (1) for the word “This” substitute the words “Subject to paragraph (12), this”; and
(b)at the end add–
“(12) This regulation shall not apply to practice staff in respect of whom a pension is payable under any of regulations E1 to E6 who were employed by a registered medical practitioner on both 31st August 1997 and 1st September 1997 and who–
(a)were ineligible to rejoin the scheme with effect from 1st September 1997; or
(b)made an election not to rejoin the scheme with effect from that date and who do not cancel that election.”.