(a) This article applies to any interest created after the effective date of this article, whether designated as a conservation or preservation easement or as a covenant, equitable servitude, restriction, easement or otherwise.
(b) This article applies to any interest created before the effective date when the interest would have been enforceable had it been created after its effective date, unless retroactive application contravenes the Constitution or laws of the United States or of this state. No conservation easement or preservation easement created prior to the effective date of this article may be invalidated by reason of the enactment of this article when the conservation easement or preservation easement was valid under the law in effect at the time of its creation.
(c) This article does not invalidate any interest, whether designated as a conservation or preservation easement or as a covenant, equitable servitude, restriction, easement or otherwise, that is enforceable under another law of this state.