As used herein, "open space easement" means (a) any right or interest in real property acquired by or dedicated to the City of Martinez (1) for the purpose of preserving for public use or enjoyment the natural, scenic or open character of such property or (2) for the purposes of preserving those uses described in California Government Code § 65560, or its successor provisions, or (b) any limitation of future use of real property by way of a deed, covenant, servitude, easement, or other property restriction imposed or required by the City of Martinez for the purpose of preserving the natural, scenic or open character of the property which limitation results from the City's (conditional) approval of a plan amendment, zoning change, use permit, subdivision or any other entitlement permit for development. Open space easement shall not include easements described above which have been acquired pursuant to certain specific statutory authorities which provide exclusive termination procedures for easements created pursuant to such authority.