Every franchisor registered or required to be registered pursuant to RCW 19.100.020 shall, in each sale of a franchise in Washington, conform its franchise agreement to the Franchise Investment Protection Act, chapter 19.100 RCW, and the rules adopted thereunder or include in its franchise agreement or Franchise Disclosure Document an addendum concerning the applicability of the Franchise Investment Protection Act, chapter 19.100 RCW. The addendum shall be in the form prescribed by the director.