9.—(1) A person may make an election under this regulation by giving written notice to the Secretary of State.
(2) An election has effect from the first day of the month after the month in which the notice is given.
(3) But if the notice is given before or within 3 months after the start of employment in a capacity mentioned in Schedule 2, the election has effect from the first day of that employment.
(4) An election ceases to have effect from the date on which an election under regulation 10 (election for employment to be pensionable) has effect.