Section 4(d) in The Nabakrushna Choudhury Centre for Development Studies Employees Pension Fund (Establishment & Administration) Rules, 1997
(d)Quarterly deposit of the annual requirement by the Secretary - The Secretary shall deposit the yearly requirement of contribution for disbursement of Pension either in one instalment before 31st January or in quarterly instalments by 31st May, 31st Aug., 30th November and 28th February.
