Where a person was, after the 30th September 1960 and before the 2nd February 1965, taken into the civil service of the State as an officer employed by the National Assistance Board in a Reception Centre established in accordance with subsection (1) of section 17 of the National Assistance Act 1948 after having been employed by a local authority for the purposes of functions exercised by that authority on behalf of the National Assistance Board in accordance with subsection (2) of section 17 of that Act, and his employment by the authority was, in the opinion of the Treasury, of the same nature and for the same purpose as his employment in the service of the State, then, subject to the provisions of Rule 2 of these Rules, his service in such employment by the authority before the date on which he was taken into the service of the State, but not before the 1st January 1919, may be reckoned for the purposes of the Superannuation Act 1965 as employment in an unestablished capacity within the meaning of that Act.