20.—(1) A person who, in relation to a scheme employment, is an eligible person but is not in pensionable service under this scheme may opt to become an active member of this scheme in relation to service in that employment.
(2) A person who has a partnership pension account in relation to service in a scheme employment is not prevented from opting into this scheme in relation to service in that employment (see regulation 21 for when the option in takes effect).
(3) The option under this regulation may only be exercised by notice to the scheme manager in a form required by the scheme manager (“opt-in notice”).
(4) A person who exercises the option under this regulation in relation to service in a scheme employment opts into this scheme in relation to service in that employment with effect from the date on which the opt-in notice is received by the scheme manager.
(5) The option under this regulation is taken to be exercised on that date.
(6) If P opts out of this scheme within 12 months after opting in, P may not opt in again until after the end of that period of 12 months.