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

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59. A lawyer who has a document or information that is the subject of a request referred to in section 60.5 or 60.6 of the Professional Code (chapter C-26) must, if he refuses the request, retain the document or information for as long as is necessary to allow the client to exhaust his recourses.
O.C. 129-2015, s. 59.