§ 606. Revocation of approval. For good cause shown, the commissioner may, in his discretion, revoke approval of an employer's application previously granted. Good cause may include, but shall not be limited to, failure to comply with the assurances and certifications required under section six hundred five hereof, failure to supply information requested relative to the operation of a shared work program, unreasonable revision of productivity standards for the work force, or other conduct or occurrences tending to defeat the purposes, intent and effective operation of a shared work program.