O.C.G.A. § 44-3-222

A property owners' development shall come into existence upon either the recordation of the declaration pursuant to this article or the amendment of a recorded declaration in accordance with Code Section 44-3-235. Any declaration or amendment intending to bring or avail a development of the benefits and provisions of this article shall state an affirmative election to be so governed. Any original declaration shall be duly executed by or on behalf of all of the owners of the submitted property. Any such amendment to an existing declaration shall be executed in accordance with the terms of the recorded declaration being amended thereby.