(a) A corporation may issue the number of shares of each class or series authorized by the articles of incorporation. Shares that are issued are outstanding shares until they are reacquired, redeemed, converted, or cancelled.
(b) The reacquisition, redemption, or conversion of outstanding shares is subject to the limitations of subsection (c) of this section and to G.S. 55-6-40.
(c) At all times that shares of the corporation are outstanding, there must be outstanding one or more shares that together have unlimited voting rights and one or more shares that together are entitled to receive the net assets of the corporation upon dissolution.