The corporation may—
((1)) adopt a constitution, bylaws, and regulations;
((2)) adopt and alter a corporate seal;
((3)) establish and maintain offices and buildings to conduct its activities;
((4)) establish State and territorial organizations and local branches;
((5)) acquire, own, lease, encumber, and transfer property as necessary to carry out the purposes of the corporation, subject to its constitution and instructions of donors;
((6)) sue and be sued; and
((7)) do any other act necessary and proper to carry out the purposes of the corporation.