(1) Except as provided in subsection (2) of this section, the validity of corporate action may not be challenged on the ground that the nonprofit corporation lacks or lacked power to act.
(2) The power of a nonprofit corporation to act may be challenged:
(a) In a proceeding by the corporation, directly or through a receiver, trustee, or other legal representative, against an incumbent or former director, officer, employee, or agent of the corporation; or
(b) In a proceeding by the attorney general under RCW 24.03A.936.