domestic remedies have been invoked and exhausted in the matter, in conformity with the generally recognized principles of international law. This shall not be the rule where the application of the remedies is unreasonably prolonged or is unlikely to bring effective relief to the person who is the victim of the violation of this Convention; (d) The Committee shall hold closed meetings when examining communications under this article; (e) Subject to the provisions of subparagraph (c), the Committee shall make available its good offices to the States Parties concerned with a view to a friendly solution of the matter on the basis of respect for the obligations provided for in this Convention. For this purpose, the Committee may, when appropriate, set up an ad hoc conciliation commission; (f) In any matter referred to it under this article, the Committee may call upon the States Parties concerned, referred to in subparagraph (b), to supply any relevant information; (g) The States Parties concerned, referred to in subparagraph (b), shall have the right to be represented when the matter is being considered by the Committee and to make submissions orally and/or in writing; (h) The Committee shall, within twelve months after the date of receipt of notice under subparagraph (b), 88