9.—(1) Subject to regulations 10 (final pay: reserve forces, maternity leave etc.) and 11 (final pay: fees), a member’s final pay for an employment is the member’s pensionable pay for as much of the final pay period as the member is entitled to count as an active member in relation to that employment.
(2) A member’s final pay period is the year ending with the day on which the member stops being an active member.
(3) But a member may choose instead to treat as the member’s final pay period either of the two preceding years ending with a day that is the anniversary of the last day the member was an active member.
(4) In the case of part-time employment, the final pay is the pay that would have been paid for a single comparable whole-time employment.
(5) Any reduction or suspension of a member’s pensionable pay during the final pay period because of the member’s absence from work owing to illness or injury is disregarded.