Section 33A(a) in The General Provident Fund (Central Service) Rules, 1960
(a)The balance at the credit of such subscriber shall not at any time during the 3 years preceding the month of death have fallen below the limits of -(i)Rs. 4000 in the case of a subscriber who has held, for the greater part of the aforesaid period of three years, a post the maximum of the pay scale of which is Rs.1300 or more;(ii)Rs. 2500 in the case of a subscriber who has held, for the greater part of the aforesaid period of three years, a post the maximum of the pay scale of which is Rs.900 or more but less than Rs.1300;(iii)Rs. 1500 in the case of subscriber who has held, for the greater part of the aforesaid period of three years, a post the maximum of the pay scale of which is less than Rs.291 or more but less than Rs. 900;(iv)Rs. 1000 in the case of a subscriber who has held, for the greater part of the aforesaid period of three years, a post the maximum of the pay scale of which is less than Rs.291.