The Local Government Superannuation Regulations 1986

3.  In ascertaining for the purposes of this Part the length of reckonable service which a person is or was entitled to reckon, the reckonable service is to count at the length at which it would reckon in calculating the amount of a retirement pension under regulationn E2(1)(b)(ii), except that—

(a) any period of reckonable service which was reckonable under section 17 of the Act of 1937 (which related to teachers) is to be ignored,

(b) it is to be assumed that he had completed the payment of any additional contributory payments, and

(c) if additional contributions under regulation D10 of the 1974 regulations (or any corresponding provision of an earlier enactment) or regulation C6 have been paid but not all those for which he was originally liable, the apportionment formula in paragraph 3 of Schedule 8 is to be applied.