(1)The Minister of Education may, with the consent of the Treasury, by rules provide that, for the purposes of section thirteen of the Teachers (Superannuation) Act, 1925 (which relates to the treatment of approved external service as contributory service in certain circumstances), any specified employment, whether before or after the passing of this Act, in the service of the government of, or of any public authority in, any part of His Majesty's dominions (as defined for the purposes of subsection (1) of section twenty-one of that Act), being employment which is or was pensionable or in respect of which contributions are or were payable to a provident fund, shall be treated as approved external service.
(2)Any such rules may include provisions modifying the said section thirteen in its application to any particular form of employment which under the rules is to be treated as approved external service for the purposes of that section.