Is PSU Banks are offering Pension option to resigned employees?

I joined UCO Bank in October 1982 and resigned from service on January 2003 after completion of more than 20 years service. At the influence of the union and associations some employees did not opt for pension.At the time of resignation I have no choice left for pension. Since, then I moved for work and I live in overseas. I would appreciate if anyone could give me an answer regarding the fate of inclusion of resigned employees.