15.—(1) This regulation applies if a person (P) opts out of this scheme in relation to a continuous period of service in scheme employment—
(a)before the end of three months after P’s first day of a continuous period of service in scheme employment; or
(b)before the end of three months after the automatic re-enrolment date.
(2) If paragraph (1)(a) applies, P is taken never to have been in pensionable service under this scheme in relation to that continuous period of service in scheme employment.
(3) If paragraph (1)(b) applies, P is taken not to have been in pensionable service under this scheme in relation to that period of service during the period referred to in paragraph (1)(b).
(4) This regulation does not require the scheme manager to pay P any additional amount which becomes payable by P in respect of national insurance contributions because P has not after all been an active member of this scheme during any period.