adopt and amend a constitution, bylaws, and regulations to carry out the purposes of the corporation;

adopt and alter a corporate seal;

establish and maintain offices to conduct its activities;

make contracts;

acquire, own, lease, encumber, and transfer property as necessary and appropriate to carry out the purposes of the corporation;

establish, regulate, and discontinue subordinate State and territorial subdivisions and local chapters or posts;

publish a magazine and other publications;

sue and be sued; and

do any other act necessary and proper to carry out the purposes of the corporation.