47A pension payable by a local authority in England or Wales under any enactment other than section 15(1) to (7) of the [1967 c. 28.] Superannuation (Miscellaneous Provisions) Act 1967 in respect of—
(a)service as a justices' clerk or as the employee of a justices' clerk ; or
(b)service as a person employed by a magistrates' courts committee to assist a justices' clerk.