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.