Ariz. Rev. Stat. § 33-440
A. An owner of real property may enter into a private covenant regarding that real property and the private covenant is valid and enforceable according to its terms if all of the following apply:
C. Except during the period of declarant control, or if during the period of declarant control with the written consent of the declarant in each instance, the following apply to an amendment to a declaration:
2. An amendment to a declaration may apply to fewer than all of the lots or less than all of the property that is bound by the declaration and an amendment is deemed to conform to the general design and plan of the community, if both of the following apply:
E. For the purposes of this section: