A person registered under this chapter solely to sell leads of potential buyers to residential mortgage lenders or mortgage brokers, or solely to match buyers with residential mortgage lenders or mortgage brokers through a computerized loan origination system recognized by the United States department of housing and urban development, shall be required to make only those disclosures under this chapter that apply to the portion of the transaction during which they have direct buyer contact, and shall be subject to all fair conduct and prohibition requirements in their dealing with buyers.