Upon the enactment of the Model Rules of Professional Conduct, published ethical norms will for the first time give explicit consideration to the lawyer's behavior in the process of negotiation. Rules 4.1, 4.2, and 4.3 deal with negotiation. Although the Canons, the interpretations of the Canons, and the Disciplinary Rules and Ethical Considerations gave tangential consideration to negotiating, 1 none of the Disciplinary Rules or Ethical Considerations explicitly considered negotiation apart from the process of litigation or counseling. The mere recognition of negotiation as a separate process worthy of unique rules is a large step. The purpose of this paper is to address the general question of truthfulness as that question is faced in Rule 4.2.2
White, James J. "Machiavelli and the Bar: Ethical Limitations on Lying in Negotiation." Am. B. Found. Res. J. 1980 (1980): 926-38.