Interpretation of the State Labour and Social Affairs Committee of the USSR and the Secretariat of the All-Union Central Council of Trade Unions respecting the method of calculating the continuous period of employment at a single undertaking, institution or organisation entitling wage and salary earners to a 20% old-age pension supplement (s. 116 of the Regulations on the method of fixing and paying State pensions). (Approved by Order No. 258/18/67 of the State Labour and Social Affairs Committee of the USSR and the Secretariat of the All-Union Central Council of Trade Unions, dated 28 Oct. 1982.)