52.—(1) Subject to paragraph (2), a police authority by whom a pension is payable under this Part may, in their discretion, withdraw the whole or any part of the pension for any period during which the pensioner is serving as a regular police officer in any police force; and, where they have done so, they shall be discharged from all actual or contingent liability in respect of the pension or the part of it withdrawn for the period in question.
(2) This regulation does not apply to a pension under regulation 39 (survivors’ pensions) or a pension credit under regulation 61.