7. A certificate for a real estate agent restricted to loans secured by immovable hypothec, provided for in paragraph 6 of section 1, may be issued only to a natural person holding a certificate for a market intermediary in insurance issued under the Act respecting market intermediaries. A holder of that certificate may use the title of real estate agent restricted to loans secured by immovable hypothec but may engage in a brokerage transaction referred to in section 1 of the Act only in respect of loans secured by immovable hypothec and only if he is employed by the holder of a certificate for a real estate broker restricted to loans secured by immovable hypothec or by a multidisciplinary firm holding a certificate provided for in any of paragraphs 5 to 16 of section 1 of the Regulation respecting multidisciplinary firms, or if he is authorized to act on behalf of the holder of such a certificate. A holder of that certificate may not employ a holder of a real estate broker’s or agent’s certificate or authorize such a person to act on his behalf.