Subject to the provisions of the declaration and other provisions of law, a unit owner:

(1) May make any improvements or alterations to the owner's unit that do not affect the structural integrity or mechanical or electrical systems or lessen the support of any portion of the condominium;

(2) May not change the appearance of the common elements or the exterior appearance of a unit without permission of the association;

(3) After acquiring an adjoining unit or an adjoining part of an adjoining unit may, with approval of the board of directors, remove or alter any intervening partition or create apertures therein, even if the partition in whole or in part is a common element, if those acts do not adversely affect the structural integrity or mechanical or electrical systems or lessen the support of any portion of the condominium. Removal of partitions or creation of apertures under this subsection is not a relocation of boundaries. The board of directors shall approve a unit owner's request, which request shall include the plans and specifications for the proposed removal or alteration, under this subsection within thirty days, or within such other period provided by the declaration, unless the proposed alteration does not comply with this chapter or the declaration or impairs the structural integrity or mechanical or electrical systems in the condominium. The failure of the board of directors to act upon a request within such period shall be deemed approval thereof.