(a) The practice of real estate brokerage includes acting in the capacity of a broker, associate broker or salesperson as defined in section four of this article.
(b) The practice of real estate brokerage does not include the activities normally performed by an appraiser, mortgage company, lawyer, engineer, contractor, surveyor, home inspector or other professional who may perform an ancillary service in conjunction with a real estate transaction.
(c) The provisions of this article do not apply to:
(1) Any person acting on his or her own behalf as owner or lessor of real estate.