Subject to the provisions of the condominium declaration and other provisions of law, a unit owner:
(1) May make any improvements or alterations to his unit that does not impair the structural integrity or mechanical 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 or any portion of the condominium, without permission of the association, and
(3) After acquiring an adjoining unit or an adjoining part of an adjoining unit, may remove or alter any intervening partition or create apertures therein, even if the partition in whole or in part is a common element, provided those acts do not impair the structural integrity or mechanical systems or lessen the support of any portion of the condominium.