Conn. Gen. Stat. § 23-8a

On and after June 29, 1999, any person, organization or political subdivision of the state to whom the state proposes to convey state park land, forest land or other state land held as protected open space shall execute a conservation easement or similar encumbrance in favor of the state which provides for the same restriction on development of such land as that which was in effect for such land immediately prior to such conveyance. No such state land may be conveyed without such an encumbrance.