21. (1) Upon petition by the Société and by one of its partners contemplated in sections 16 and 18, the Lieutenant-Governor may issue, on such conditions as are therein set out, letters patent under the Great Seal constituting at least three persons designated by the Société and the partner concerned to represent them for purposes of constituting a subsidiary in accordance with this act. The petition shall state the name of the new legal person, its purposes or objects, the location of its head office, the powers, rights and privileges which it shall enjoy, the amount of its capital stock and the appointment of its directors, which shall comply with sections 17 and 19.
(2) Notice of the issuing of such letters patent shall be published in the Gazette officielle du Québec.
(3) A legal person so constituted shall have the powers of a company constituted under Part I of the Companies Act and shall be governed by Part I of the Companies Act, save for any provisions inconsistent with this act.
(4) Upon petition by a legal person constituted under this Part, the Lieutenant-Governor, by supplementary letters patent, may amend the objects, powers, capital stock and other matters affecting the letters patent of that legal person provided that they are not inconsistent with the applicable provisions of sections 18 to 20. Notice of these supplementary letters patent is then published in the Gazette officielle du Québec.