25.—(1) This regulation applies if a person (P) opts out of this scheme in relation to a continuous period of service in scheme employment three months or more after P’s—
(a)first day of a continuous period of service in scheme employment; or
(b)automatic re-enrolment date.
(2) If P exercises the option under paragraph (1)(a) or (b), P ceases to be in pensionable service under this scheme in relation to that continuous period of service in scheme employment—
(a)on the first day of the first pay period beginning on or after the date on which the option is exercised; or
(b)if the scheme manager considers that day inappropriate, on the first day of any later pay period which the scheme manager considers appropriate.