(a) A corporation may amend its certificate of incorporation at any time to add or change a provision that is required or permitted in the certificate of incorporation as of the effective date of the amendment or to delete a provision that is not required to be contained in the certificate of incorporation. Whether a provision is required or permitted in the certificate of incorporation is determined as of the effective date of the amendment.
(b) A stockholder of the corporation does not have a vested property right resulting from any provision in the certificate of incorporation, including provisions relating to management, control, capital structure, dividend entitlement, or purpose or duration of the corporation.