Section 139(1) in The Goa, Daman and Diu Town and Country Planning Act, 1974
(1)Where the Government is satisfied that the purpose for which any Planning and Development Authority was established under this Act, have been substantially achieved so as to render the continued existence of the Planning and Development Authority in the opinion of the Government unnecessary, the Government may, by notification, declare that the Planning and Development Authority shall be dissolved with effect from such date as may be specified in such notification.