- EC for Phase - I (1.2.1991)
- EC for Phase - II (5.8.1996)
- EC for Phase - III (3.4.2008)
- EC for Diesel Quality (23.12.2009)
- EC for SPM (1.4.2011)
- EC for PPU (1.11.2011)
- EC for BS VI (10.7.2017)
- EC for Desal Project (18.4.2019)
- EC for Modernization Project (19.01.2021)
- EC for Cap Ex 16.6 to 18.2 MMTPA (9.1.2023)