S-40.1, r. 1 - Regulation under the Act respecting the Québec correctional system

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51. The facility director or a personnel member designated by the facility director opens, inspects and may read mail sent to or by an inmate to determine whether its content could endanger the safety of a person or the security of the facility, interfere with the administration of justice or be used to commit an offence, or to ensure that it does not contain contraband or any other thing the inmate is prohibited or restricted from possessing in the facility.
Despite the foregoing, the facility director or personnel member may not open, inspect or read mail between an inmate and his or her attorney, a member of the National Assembly, a member of a legislative assembly, a member of the House of Commons, the Commission des droits de la personne et des droits de la jeunesse, the Public Curator or the Police Ethics Commissioner.
O.C. 5-2007, s. 51.