1997: Civil aviation ministry sets up a committee to examine the need for a second airport June 2000: Committee suggests three sites and upgradation of the Mumbai airport

September 2000: Navi Mumbai site found most suitable. State government approves plan

July 2007: Union cabinet gives in-principle approval to new airport

September 2006: CIDCO seeks MoEF approval. Ministry forwards application to National Coastal Zone Management Authority

October 2007: Authority recommends amendment to CRZ Notification, 1991

February 17, 2009: Ministry refuses clearance. Asks CIDCO to approach Bombay High Court that banned destruction of mangroves in 2005

March 2, 2009: CIDCO files notice of motion in the high court to get clearance for amending CRZ notification