The following words and phrases when used in this article have the meanings given to them in this section unless the context clearly indicates otherwise:

(a) "Conservation easement" means a nonpossessory interest of a holder in real property, whether appurtenant or in gross, imposing limitations or affirmative obligations, the purposes of which include, but are not limited to, retaining or protecting for the public benefit the natural, scenic or open-space values of real property; assuring its availability for agricultural, forest, recreational or open-space use; protecting natural resources and wildlife; maintaining or enhancing land, air or water quality; or preserving the historical, architectural, archaeological or cultural aspects of real property.

(b) "Holder" means:

(1) A governmental body empowered to hold an interest in real property under the laws of this state or the United States.

(2) A charitable corporation, charitable association or charitable trust registered with the Secretary of State and exempt from taxation pursuant to Section 501(c)(3) of the Internal Revenue Code of 1986 (Public Law 99-514, 26 U.S.C. Section 501(c)(3), or other federal or state statutes or rules, the purposes or powers of which include retaining or protecting the natural, scenic, agricultural or open-space values of real property; assuring the availability of real property for agricultural, forest, recreational or open-space use; protecting natural resources and wildlife; maintaining or enhancing land, air or water quality; or preserving the historical, architectural, archaeological or cultural aspects of real property.

(c) "Preservation easement" means a nonpossessory interest in an historical building.

(d) "Third-party right of enforcement" means a right provided in a conservation or preservation easement, in order to enforce any of its terms, granted to a governmental body, charitable corporation, charitable association or charitable trust, which, although eligible to be a holder, is not a holder.