"The average pensionable pay of a regular firefighter is, subject to paragraphs (5) to (7C), the aggregate of his pensionable pay for the year ending with the relevant date."
"A member's final pay for an employment is his pay for as much of the final pay period as he is entitled to count as active membership in local government employment" (Regulation 21(1) ) "
"(3) The average pensionable pay of a regular firefighter is … the amount determined in relation to the performance of the duties of his role for the year ending with the relevant date."