Maryland Code, Corporations and Associations § 2-606.1

(1) The stock issued by a corporation before the time the amendment with respect to the stock is effective shall cease to be voidable as a result of the failure to file articles of amendment or articles of amendment and restatement at the time the amendment becomes effective; and

(2) A right or liability accrued by reason of the issuance of the stock by a corporation before the time the amendment becomes effective shall be extinguished at the time the amendment becomes effective, except to the extent that the person having the right or liability has acted detrimentally in reliance on the right or liability solely by reason of the issuance of the stock.