The agreement between a rental listing referral agent and a prospective tenant shall contain:
"We are a referral service only. We are not acting as real estate salespersons or brokers. We do not guarantee that the purchaser will find a satisfac-tory rental unit through our service. Our only purpose is to furnish the purchaser with lists of available rental units."
49 Pa. Code § 35.335
The provisions of this §35.335 issued under the Real Estate Licensing and Registration Act (63 P.S. §§ 455.101-455.902).