A nonresidential condominium may elect to be exempt from the requirement for creating and maintaining a repair and replacement reserve pursuant to § 2211 of this title if the declaration so provides or otherwise by the vote of a majority of the unit owners. A condominium that contains units restricted exclusively to nonresidential purposes and other units that may be used for residential purposes is not subject to this section (and therefore is not required to maintain a repair and replacement reserve) unless the units that may be used for residential purposes would comprise a condominium in the absence of the nonresidential units or the declaration provides that this section applies. Nothing herein shall prevent the establishment of a condominium for residential purposes and a nonresidential condominium for the same real estate.