The state fire marshal may suspend or revoke a special inspector’s certificate of competency for cause, after due investigation, if the state fire marshal finds incompetence, untrustworthiness, falsification of any matter or statement contained in a special inspector’s application or report, or a failure by the special inspector to report findings of any inspection made by such inspector to the chief inspector. Such a suspension or revocation of certificate shall be effective as soon as notice of the suspension or termination has been delivered to the special inspector or the inspector’s employer.