The Tata Lease agreement was last renewed on August 20, 2005, with retrospective effect after its term expired on December 31, 1995. A total of 1,800 acres of land were allegedly encroached upon in Jamshedpur between 1995 and 2005, and 86 (now 124) slums came up on these land parcels during the period when the lease was ineffective. This land was excluded from the Tata Lease agreement in 2005 at the request of Tata Steel. The term of the existing lease agreement ends on December 31, officials familiar with the matter said.