Or. State. Bar. R. Regul. and Polic. 1.9
Defined Terms (see Rule 1.0):
"Confirmed in writing"
"Informed consent"
"Firm"
"Knowingly"
"Known"
"Matter"
"Reasonable"
"Substantial"
Comparison to Oregon Code
This rule replaces DR 5-105(C), (D) and (H). Like Rule 1.7, this rule is a significant departure from the language and structure of the Oregon Code provisions on conflicts. Paragraph (a) replaces the sometimes confusing reference to "actual or likely conflict" between current and former client with the simpler "interests [that are] materially adverse." The prohibition applies to matters that are the same or "substantially related," which is virtually identical to the Oregon Code standard of "significantly related."
Paragraph (b) replaces the limitation of DR 5-105(H), but is an arguably clearer expression of the prohibition. The new language makes it clear that a lawyer who moves to a new firm is prohibited from being adverse to a client of the lawyer's former firm only if the lawyer has acquired confidential information material to the matter while at the former firm.
Paragraph (c) makes clear that the duty not to use confidential information to the client's disadvantage continues after the conclusion of the representation, except where the information "has become generally known."
Paragraph (d) defines "substantially related." The definition is taken in part from former DR 5-105(D) and in part from Comment [3] to ABA Model Rule 1.9.