Measures shall also be taken to ensure that the regulations are brought to the knowledge of persons from whom such labour is exacted. Article 25 25. The illegal exaction of forced or compulsory labour shall be punishable as a penal offence, and it shall be an obligation on any Member ratifying this Convention to ensure that the penalties imposed by law are really adequate and are strictly enforced. Article 26 26. (1) Each Member of the International Labour Organisation which ratifies this Convention undertakes to apply it to the territories placed under its sovereignty, jurisdiction, protection, suzerainty, tutelage or authority, so far as it has the right to accept obligations affecting matters of internal jurisdiction; provided that, if such Member may desire to take advantage of the provisions of article 35 of the Constitution of the International Labour Organisation, it shall append to its ratification a declaration stating-(1) the territories to which it intends to apply the provisions of this Convention without modification; (2) the territories to which it intends to apply the provisions of this Convention with modifications, together with details of the said modifications; (3) the territories in respect of which it reserves its decision. 26. (2) The aforesaid declaration shall be deemed to be an integral part of the ratification and shall have the force of ratification. It shall be open to any Member, by a subsequent declaration, to cancel in whole or in part the reservations made, in pursuance of the provisions of subparagraphs (2) and (3) of this Article, in the original declaration. Article 27 27. The formal ratifications of this Convention under the conditions set forth in the Constitution of the International Labour Organisation shall be communicated to the Director-General of the International Labour Office for registration. Article 28 29. (1) This Convention shall be binding only upon those Members whose ratifications have been registered with the International Labour Office. 29. (2) It shall come into force twelve months after the date on which the ratifications of two Members of the International Labour Organisation have been registered with the Director-General.