178.—(1) In this Part, “pensionable earnings”, in relation to a pay period, has the following meaning.
(2) For any pay period falling within a period of sick leave in which the pensionable earnings of a member (P) are reduced, P’s pensionable earnings are the reduced amount of pensionable earnings paid to P.
(3) For a pay period falling within a period in which an election under regulation 25 has effect or is taken to have effect, P’s pensionable earnings are an amount equal to P’s notional salary.
(4) For a pay period falling within a period in which P is on maternity leave, adoption leave or paternity leave, P’s pensionable earnings include any statutory pay paid to P.