(1) The declaration may authorize the declarant, or a managing agent or some other person or persons selected or to be selected by the declarant, to appoint and remove some or all of the members of the management committee or some or all of the officers of the unit owners' association, or to exercise powers and responsibilities otherwise assigned by the declaration and by this act to the unit owners' association, its officers, or the management committee. No amendment to the declaration not consented to by all unit owners shall increase the scope of this authorization, and no such authorization shall be valid after the first to occur of the following:

1. (a) expiration of the time limit set by the declaration, which shall not exceed six years in the case of an expandable condominium, four years in the case of a condominium project containing any convertible land, or three years in the case of any other condominium project; or
2. (b) after units to which three-fourths of the undivided interest in the common areas and facilities appertain have been conveyed, or after all additional land has been added to the project and all convertible land has been converted, whichever last occurs.