(a) Ratification of an act or transaction under this subchapter or validation of an act or transaction as provided by Sections 21.914 through 21.917 is not the exclusive means of ratifying or validating any act or transaction taken by or on behalf of the corporation, including any defective corporate act or any issuance of putative shares or other shares, or of adopting or endorsing any act or transaction taken by or in the name of the corporation before the corporation exists.
(b) The absence or failure of ratification of an act or transaction in accordance with this subchapter or of validation of an act or transaction as provided by Sections 21.914 through 21.917 does not, of itself, affect the validity or effectiveness of any act or transaction or the issuance of any shares properly ratified under common law or otherwise, nor does it create a presumption that any such act or transaction is or was a defective corporate act or that those shares are void or voidable.