CERTAIN OPTIONAL CHARACTERISTICS OF SHARES.

(a) Subject to Sections 21.152 and 21.153, if authorized by the corporation's certificate of formation, a corporation may issue shares that:

(1) are redeemable, at the option of the corporation, shareholder, or other person or on the occurrence of a designated event, subject to Sections 21.303 and 21.304;

(2) entitle the holders of the shares to cumulative, noncumulative, or partially cumulative distributions;

(3) have preferences over any or all other classes or series of shares with respect to payment of distributions;

(4) have preferences over any or all other classes or series of shares with respect to the assets of the corporation on the voluntary or involuntary winding up and termination of the corporation;

(5) are exchangeable, at the option of the corporation, shareholder, or other person or on the occurrence of a designated event, for shares, obligations, indebtedness, evidence of ownership, rights to purchase securities of the corporation or one or more other entities, or other property or for a combination of those rights, assets, or obligations, subject to Section 21.303; and

(6) are convertible into shares of any other class or series, at the option of the corporation, shareholder, or other person or on the occurrence of a designated event.

(b) Shares without par value may not be converted into shares with par value unless:

(1) at the time of conversion, the part of the corporation's stated capital represented by the shares without par value is at least equal to the aggregate par value of the shares to be converted; or

(2) the amount of any deficiency computed under Subdivision (1) is transferred from surplus to stated capital.