An established district may expand the geographic area of the district if: a petition for inclusion is submitted from owners of at least 51% of the total number of parcels of nonexempt property and, subject to subsection (b) of this section, a designated board member of a condominium or cooperative housing corporation proposed for inclusion in the district; the petition under item (1) of this subsection is accepted by a majority vote of the board of the district corporation; and the appropriate documents, as applicable, are submitted under § 12–1008 of this subtitle and a hearing is held under § 12–1009 of this subtitle. Notwithstanding any other provision of this title and subject to paragraph (2) of this subsection, a condominium or cooperative housing corporation that is located in the proposed expanded geographic area of the district may petition to join the expansion. A condominium or cooperative housing corporation described under paragraph (1) of this subsection may petition to join the expansion only if: the condominium or cooperative housing corporation is governed by a board; the board votes to join the district corporation; and the board has a representative member of the board sign the appropriate documents required under § 12–1008 of this subtitle. For the purposes of the votes cast under subsection (a)(1) of this section: a condominium or cooperative housing corporation shall be considered a single parcel; and the decision reached by the board shall constitute the vote of the condominium or cooperative housing corporation.