No supplier who, pursuant to an agreement with a wholesaler, has designated a sales territory for which a wholesaler is primarily responsible or in which a wholesaler is required to concentrate its efforts shall enter into an agreement with any other wholesaler for the purpose of establishing an additional wholesaler for any of its brands, including any brand or brands introduced after the effective date of the agreement, in all or part of the same territory.
R.I. Gen. Laws § 3-13-9