Section 20(2) in The Gujarat Town Planning and Urban Development Act, 1976
(2)If the land referred to in sub-section (1) is not acquired by agreement within a period of ten years from the date of the coming into force of the final development plan or if proceedings under the Land Acquisition Act, 1894 (1 of 1894) are not commenced within such period, the owner or any person interested in the land may serve a notice on the authority concerned requiring it to acquire the land and if within six months from the date of service of such notice the land is not acquired or no steps are commenced for its acquisition, the designation of the land as aforesaid shall be deemed to have lapsed.