(a) The articles of incorporation, bylaws, an agreement among shareholders or an agreement between shareholders and the corporation may impose restrictions on the transfer or registration of transfer of shares of the corporation. A restriction does not affect shares issued before the restriction was adopted unless the holders of the shares are parties to the restriction agreement or voted in favor of the restriction.
(b) A restriction on the transfer or registration of transfer of shares is valid and enforceable against the holder or a transferee of the holder if the restriction is authorized by this section and its existence is noted conspicuously on the front or back of the certificate or is contained in the information statement required by subsection (b), section six hundred twenty-six of this article. Unless a restriction is noted as required by this subsection, a restriction is not enforceable against a person without knowledge of the restriction.
(c) A restriction on the transfer or registration of transfer of shares is authorized:
(1) To maintain the corporation's status when it is dependent on the number or identity of its shareholders;