Leaders of several Opposition-ruled States — Rajasthan, Chhattisgarh, Jharkhand, Punjab and Himachal Pradesh — have announced that they would revert to the old pension system (OPS). As a part of fiscal prudence, the OPS was replaced by the National Pension System (NPS) for all Central Government employees in 2004. All State governments, except West Bengal and Tamil Nadu, implemented the NPS for State government employees during 2003-13 (see Table).