Section 20-12-4 - Creation, transfer and duration(a) Except as otherwise provided in this article, a conservation or preservation easement may be created, conveyed, recorded, assigned, released, modified, terminated or otherwise altered or affected in the same manner as other easements.(b) No right or duty of a holder, successive holder named in the easement deed or person having a third-party right of enforcement arises under a conservation or preservation easement before the easement's acceptance by the holder, successive holder or third party with right of enforcement and a recordation of the acceptance.(c) Except as provided in subsection (b), section five of this article, a conservation or preservation easement created after the effective date of this article may be perpetual in duration, but in no event shall be for a duration of less than twenty-five years.(d) An interest in real property in existence at the time a conservation or preservation easement is created, including an unrecorded lease for the production of minerals or removal of timber, shall not be impaired unless the owner of such interest is a party to the easement or expressly consents to comply with the restriction of such easement.