(a) After a merger or consolidation is completed, any shares of the new or surviving corporation acquired by that corporation as a result of distribution of shares to the shareholders of another corporation that is merged or consolidated or as a result of purchase of shares of dissenting shareholders, may be held as treasury shares until the first anniversary of the date on which the merger or consolidation takes effect.
(b) After the period during which shares described by Subsection (a) are held as treasury shares, the corporation shall retire and cancel those shares by proper amendments to its charter if the shares have not previously been reissued.