No "For Sale" or "For Rent" sings, advertising or other displays shall be maintained or permitted on any part of the Property except at such location and in such form as shall be reasonably determined by the Board; provided that the right is reserved by the Declarant, the Developer, and their agents, to maintain on the Property until the sale of the last Unit, all models, sales offices and advertising signs, banners, and lighting in connection therewith at such locations and in such forms as they shall determine, together with the right of ingress and egress and transient parking thereof through the Common Elements.