13. A full-time public office holder shall perform exclusively the duties of his office, except where the authority having appointed or designated him also appoints or designates him to other duties. Notwithstanding the foregoing, he may, with the written consent of the chair of the board of directors, engage in teaching activities for which he may be remunerated or in non-remunerated activities within a non-profit organization.
The chair of the board of directors may likewise be so authorized by the Secretary General of the Conseil exécutif. However, the chair of the board of directors of a government agency, body or enterprise that holds 100% of the shares of a second government agency, body or enterprise is the authority who may give such an authorization to the chair of the board of directors of that second agency, body or enterprise.