10 to extend the protection and assistance provided for in this article to self employed migrants insofar as such measures apply. Part III Article 20 – 1 Undertakings Each of the Contracting Parties undertakes: a to consider Part I of this Charter as a declaration of the aims which it will pursue by all appropriate means, as stated in the introductory paragraph of that part; b to consider itself bound by at least five of the following articles of Part II of this Charter: Articles 1, 5, 6, 12, 13, 16 and 19; c in addition to the articles selected by it in accordance with the preceding sub paragraph, to consider itself bound by such a number of articles or numbered paragraphs of Part II of the Charter as it may select, provided that the total number of articles or numbered paragraphs by which it is bound is not less than 10 articles or 45 numbered paragraphs. 2 The articles or paragraphs selected in accordance with sub paragraphs b and c of paragraph 1 of this article shall be notified to the Secretary General of the Council of Europe at the time when the instrument of ratification or approval of the Contracting Party concerned is deposited. 3 Any Contracting Party may, at a later date, declare by notification to the Secretary General that it considers itself bound by any articles or any numbered paragraphs of Part II of the Charter which it has not already accepted under the terms of paragraph 1 of this article. Such undertakings subsequently given shall be deemed to be an integral part of the ratification or approval, and shall have the same effect as from the thirtieth day after the date of the notification. 4 The Secretary General shall communicate to all the signatory governments and to the Director General of the International Labour Office any notification which he shall have received pursuant to this part of the Charter. 5 Each Contracting Party shall maintain a system of labour inspection appropriate to national conditions. Part IV Article 21 – Reports concerning accepted provisions The Contracting Parties shall send to the Secretary General of the Council of Europe a report at two yearly intervals, in a form to be determined by the Committee of Ministers, concerning the application of such provisions of Part II of the Charter as they have accepted. Article 22 – Reports concerning provisions which are not accepted The Contracting Parties shall send to the Secretary General, at appropriate intervals as requested by the Committee of Ministers, reports relating to the provisions of Part II of the Charter which they did not accept at the time of their ratification or approval or in a subsequent notification. The Committee of Ministers shall determine from time to time in respect of which provisions such reports shall be requested and the form of the reports to be provided. Article 23 – Communication of copies 1 Each Contracting Party shall communicate copies of its reports referred to in Articles 21 and 22 to such of its national organisations as are members of the international organisations of employers and trade unions to be invited under Article 27, paragraph 2, to be represented at meetings of the Sub committee of the Governmental Social Committee. 2 The Contracting Parties shall forward to the Secretary General any comments on the aid reports received from these national organisations, if so requested by them. Article 24 – Examination of the reports The reports sent to the Secretary General in accordance with Articles 21 and 22 shall be examined by a Committee of Experts, who shall have also before them any comments forwarded to the Secretary General in accordance with paragraph 2 of Article 23. Article 25 – Committee of Experts 1 The Committee of Experts shall consist of not more than seven members appointed by the Committee of Ministers from a list of independent experts of the highest integrity and of recognised competence in international social questions, nominated by the Contracting Parties. 2 The members of the committee shall be appointed for a period of six years. They may be reappointed. However, of the members first appointed, the terms of office of two members shall expire at the end of four years. 3 The members whose terms of office are to expire at the end of the initial period of four years shall be chosen by lot by the Committee of Ministers immediately after the first appointment has been made. 4 A member of the Committee of Experts appointed to replace a member whose term of office has not expired shall hold office for the remainder of his predecessor's term. Article 26 – Participation of the International Labour Organisation The International Labour Organisation shall be invited to nominate a representative to participate in a consultative capacity in the deliberations of the Committee of Experts. Article 27 – Sub-committee of the Governmental Social Committee 1 The reports of the Contracting Parties and the conclusions of the Committee of Experts shall be submitted for examination to a sub committee of the Governmental Social Committee of the Council of Europe. 2 The sub committee shall be composed of one representative of each of the Contracting Parties. It shall invite no more than two international organisations of employers and no more than two international trade union organisations as it may designate to be represented as observers in a consultative capacity at its meetings. Moreover, it may consult no more than two representatives of international non governmental organisations having consultative status with the Council of Europe, in respect of questions with which the organisations are particularly qualified to deal, such as social welfare, and the economic and social protection of the family. 3 The sub committee shall present to the Committee of Ministers a report containing its conclusions and append the report of the Committee of Experts. Article 28 – Consultative Assembly The Secretary General of the Council of Europe shall transmit to the Consultative Assembly the conclusions of the Committee of Experts. The