Disciplinary Rule 7-104 of the New York Lawyer's Code of Professional Responsibility, as set forth in Part 1200 of Title 22 of New York Codes, Rules and Regulations, states:
A. During the course of the representation of a client a lawyer shall not:
1. Communicate or cause another to communicate on the subject of the representation with a party the lawyer knows to be represented by a lawyer in that matter unless the lawyer has the prior consent of the lawyer representing such other party or is authorized by law to do so.
2. Give advice to a party who is not represented by a lawyer, other than the advice to secure counsel, if the interests of such party are or have a reasonable possibility of being in conflict with the interests of the lawyer's client.
N.Y. Comp. Codes R. & Regs. tit. 22, § 1200.35 ("Communicating With Represented and Unrepresented Parties").