With respect to business operations, it is unlawful to do any of the following:
(a) Make, or knowingly or negligently permit, any illegal use of any special permits, or report of sales books issued to or in favor of a licensee.
(b) Submit a check, draft, or money order to the department for any obligation or fee due the department which is thereafter dishonored or refused payment upon presentation.
(c) Fail to notify the department, within 10 days, of any change in the ownership or corporate structure of the licensee, or of the employment or termination of a mobilehome or commercial coach salesperson.