La. R.S. 12:463

Any association, upon resolution adopted by its board of directors, may enter into all necessary and proper contracts and agreements and make all necessary and proper stipulations, agreements and contracts and arrangements with any other similar corporation or association, formed in this or any other state, for the co-operative or more economical carrying on of its business, or any part or parts thereof. Any two or more associations may, by agreement between them, unite in employing and using, or may employ and use, separately the same personnel, methods, means and agencies for carrying on and conducting their respective businesses.