JUDGMENT

R.V. Raveendran, J. —

Leave granted.

2. The respondent joined the Railway service on 10.2.1947. He was a subscriber to Contributory Provident Fund Scheme. Railways introduced the pension scheme vide Railway Board’s letter dated 16.11.1957. Under the said scheme, those who entered Railway service on or after 16.11.1957, were automatically governed by the pension scheme. Those employees who were in service as on 1.4.1957 and those who joined between 1.4.1957 and 16.11.1957 were given an option to switch over to pension scheme instead of continuing under the Contributory Provident Fund Scheme. Those who did not opt for the pension scheme were given further opportunities to exercise options to switch over to the pension scheme, whenever the pension scheme was liberalised or made more beneficial, vide Notifications dated 17.9.1960, 26.10.1962, 17.1.1964, 3.3.1966, 13.9.1968, 15.7.1972, and 23.7.1974. The validity period of the Eighth Option under Notification dated 23.7.1974, which was from 1.1.1973 to 22.1.1975, was extended from time to time upto 31.12.1978. Under the terms of the option, a retired railway employee who opted for the pension scheme had to refund to the governme