(1)    The division may make, amend and rescind any rules, forms and orders that are necessary to carry out this chapter, including rules and forms governing registrations and defining any terms, whether or not used in this chapter, insofar as the definitions are not inconsistent with this chapter. The division may define by rule false, fraudulent or deceptive practices in the offer and sale of franchises. For the purpose of rules and forms, the division may classify franchises, persons and matters within the division’s jurisdiction and may prescribe different requirements for different classes. Rules shall be made and published and all administrative procedures, including hearings under s. 553.56 and issuance of orders, shall be in accordance with ch. 227.

   (2)   No rule, form or order may be made, amended or rescinded unless the division finds that the action is necessary or appropriate in the public interest or for the protection of investors. In adopting rules and forms the division may cooperate with official administrators of other states.

   (4)   No provision of this chapter imposing any liability applies to any act done or omitted in good faith in conformity with any rule, form or order of the division, notwithstanding that the rule, form or order may later be amended or rescinded or be determined to be invalid for any reason.

   (5)   All orders shall take effect when made and filed or at such later time as the division prescribes, and the division shall, upon making and filing such order, forthwith deliver personally or by mail a copy thereof to every person to whom such order relates at the person’s last-known address as it appears on the records of the division and that delivery shall constitute notice thereof.