(1)    To the extent provided in the articles of incorporation, the board of directors may, within the limits under s. 180.0601, do any of the following:

      (a)    Determine with respect to any class of shares the preferences, limitations and relative rights, in whole or in part, before the issuance of any shares of that class.

      (b)    Create one or more series within a class, and, with respect to any series, determine the number of shares of the series, the distinguishing designation and the preferences, limitations and relative rights, in whole or in part, before the issuance of any shares of that series, except that an investment company may prescribe that each series has an indefinite number of authorized shares.

      (c)    In the case of an investment company, change the distinguishing designation of a class or series of shares, whether or not shares of the class are issued and outstanding, if the change does not affect the preferences, limitations and relative rights, in whole or in part, of the class or series.

   (2)   Before issuing any shares of a class or series under sub. (1), the corporation shall deliver to the department for filing articles of amendment, which are effective without shareholder action, that include all of the following information:

      (a)    The name of the corporation.

      (b)    The text of the amendment determining the terms of the class or series of shares.

      (c)    The number of shares of the class or series of shares created, except that an investment company may prescribe that each class and each series have an indefinite number of authorized shares.

      (d)    A statement that none of the shares of the class or series has been issued, except that this statement is not required if the only amendment to the articles of incorporation is made pursuant to sub. (1) (c).

      (e)    The date that the amendment was adopted.

      (f)    A statement that the amendment was adopted by the board of directors and that shareholder action was not required.

   (3)   

      (a)    After the articles of amendment are filed under sub. (2) and before the corporation issues any shares of the class or series that is the subject of the articles of amendment, the board of directors may alter or revoke the distinguishing designation of the class or series and the preferences, limitations, or relative rights described in the articles of amendment, by adopting another resolution appropriate for that purpose and filing with the department revised articles of amendment that comply with sub. (2). Except as provided in par. (b), a distinguishing designation, preference, limitation, or relative right may not be altered or revoked after the issuance of any shares of the class or series that are subject to the distinguishing designation, preference, limitation, or relative right, except by amendment of the articles of incorporation under s. 180.1003.

      (b)   

         1.    Except as otherwise provided in this subdivision, after the articles of amendment are filed under sub. (2), the board of directors may decrease the number of shares of the class or series that is the subject of the articles of amendment by adopting another resolution appropriate for that purpose. The shares specified in the resolution shall resume the status applicable to them immediately before their inclusion in the class or series. The board of directors may not decrease the number of shares under this subdivision below the number of such shares that are outstanding.

         2.    After the articles of amendment are filed under sub. (2), if no shares of the class or series that is the subject of the articles of amendment are outstanding, the board of directors may eliminate from the articles of incorporation all matters set forth in the articles of amendment with respect to that class or series by adopting another resolution for that purpose. The board of directors shall prepare a certificate setting forth the content of any resolution under this subdivision, stating that none of the authorized shares of the class or series are outstanding, and stating that no such shares will be issued under the articles of amendment and shall deliver the signed certificate to the department for filing. A resolution under this subdivision takes effect upon receipt of the certificate by the department and has the effect of eliminating from the articles of incorporation all matters set forth in the articles of amendment with respect to the applicable class or series.

         3.    Except as otherwise provided in this subdivision, after the articles of amendment are filed under sub. (2), the board of directors may increase the number of shares of the class or series that is the subject of the articles of amendment by adopting another resolution appropriate for that purpose. The board of directors may not increase the number of shares under this subdivision to be greater than the total number of authorized shares of the class or series as specified in the articles of incorporation.