All posts of the American Legion, Veterans of Foreign Wars, Disabled American Veterans, American Veterans of World War II, Veterans of World War I of the U.S.A., Inc., or any other veterans’ organization operating in this state and chartered by the congress of the United States have the power, after having acquired any land or property by virtue of this part, to sell, and convey the same, or any part of the same, by proper deed, whenever in their opinion such sale is deemed advisable or necessary; provided, that the sale or sales be authorized at a regular meeting of such post, or at a special meeting of such post, upon ten (10) days’ written notice to all members of the post, the notice stating the purpose of the special meeting.