75. The holder of a chartered real estate broker’s certificate to whom a brokerage contract has been awarded shall notify the contracting party in writing(1) of any change in the identity of the holder of an affiliated real estate broker’s certificate or of a chartered or affiliated real estate agent’s certificate who is responsible for representing him with the contracting party; and
(2) of any change in the address of the place of business to which the holder of an affiliated real estate broker’s certificate or of a chartered or affiliated real estate agent’s certificate who is responsible for representing him with the contracting party is assigned.