Subject to the limitations of Sections 14402, 14403, and 14404, any credit union or credit unions may purchase, acquire and hold outstanding shares of a corporation engaged exclusively in holding property of the character described in Section 14402 and which property is or is to be used for the purposes set forth in Section 14402. The purchase or acquisition of stock of any such corporation shall be approved by two-thirds of all the directors of such credit union or credit unions.