A licensee or the licensee's representative shall not initiate contact with a client or prospective client:
(a) If the person solicited has made known a desire not to receive the communication; or
(b) if the solicitation involves coercion, duress or harassment; or
(c) if the solicitation takes place at the residence of the client or prospective client, is uninvited by the client or prospective client and has not been previously agreed to by the client or prospective client.