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

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10. A lawyer must not claim specific qualities or skills relating, in particular, to his competence or to the extent or efficiency of his professional services, unless he can substantiate those claims.
Moreover, he must not claim specific qualities or skills relating to the competence or to the extent or efficiency of the services provided by other members of the Barreau or by persons with whom he engages in his professional activities within a firm, unless he can substantiate those claims.
O.C. 129-2015, s. 10.