Section 4(4)(b) in The Coal Mines Pension Scheme, 1998
(b)an amount equivalent to two per cent. of the salary of the employee from the first day of April, 1989 till the date of his [superannuation or date of his retirement] [Substituted by G.S.R. 108(E), dated 13.2.2003, for " superannuation or retirement" (w.r.e.f. 31.3.1998). ];