3. A certificate for a real estate broker restricted to loans secured by immovable hypothec, provided for in paragraph 2 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 (chapter R-15.1). A holder of that certificate may use the title of real estate broker restricted to loans secured by immovable hypothec and may carry on real estate brokerage activities only in respect of loans secured by immovable hypothec. A holder of that certificate may employ or authorize to act on his behalf only a natural person holding a certificate for a real estate agent restricted to loans secured by immovable hypothec.