Section 1101.559(a) requires the intermediary to obtain written consent from both parties to act as an intermediary. A written listing agreement to represent a seller/landlord or a written buyer/tenant representation agreement which contains authorization for the broker to act as an intermediary between the parties is sufficient for the purposes of Section 1101.559(b) if the agreement sets forth, in conspicuous bold or underlined print, the conduct that is prohibited under Section 1101.651(d) and the agreement states who will pay the broker. If the intermediary is to appoint associated licensees to work with the parties, the intermediary must obtain written permission from both parties and give written notice of the appointments to each party. The intermediary is also required to treat the parties fairly and honestly and to comply with TRELA. The intermediary is prohibited from acting so as to favor one party over the other, and may not reveal confidential information obtained from one party without the written instructions of that party, unless disclosure of that information is required by TRELA, court order, or the information materially relates to the condition of the property. The intermediary and any associated licensees appointed by the intermediary are prohibited from disclosing without written authorization that the seller will accept a price less than the asking price or that the buyer will pay a price greater than the price submitted in a written offer.