B-1, r. 3.1 - Code of Professional Conduct of Lawyers

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121. When a lawyer acts in a case pending before a tribunal, he must not communicate directly as regards the case, outside the tribunal, with the judge or a member of the tribunal, except:
(1)  in writing, if he promptly gives a copy to the opposite party filing the summons or an answer to the summons, or to his lawyer; or
(2)  orally, after having given reasonable notice to the opposite party filing the summons or an answer to the summons, or to his lawyer.
O.C. 129-2015, s. 121; I.N. 2016-01-01 (NCCP).
121. When a lawyer acts in a case pending before a tribunal, he must not communicate directly as regards the case, outside the tribunal, with the judge or a member of the tribunal, except:
(1)  in writing, if he promptly gives a copy to the opposite party who has appeared or to his lawyer; or
(2)  orally, after having given reasonable notice to the opposite party who has appeared or to his lawyer.
O.C. 129-2015, s. 121.