provide the necessary staff and facilities for the effective performance of the functions of the Committee under this Convention. 4. The Secretary-General of the United Nations shall convene the initial meeting of the Committee. After its initial meeting, the Committee shall meet at such times as shall be provided in its rules of procedure. 5. The States Parties shall be responsible for expenses incurred in connection with the holding of meetings of the States Parties and of the Committee, including reimbursement to the United Nations for any expenses, such as the cost of staff and facilities, incurred by the United Nations pursuant to paragraph 3 of this article. Article 19 1. The States Parties shall submit to the Committee, through the Secretary-General of the United Nations, reports on the measures they have taken to give effect to their undertakings under this Convention, within one year after the entry into force of the Convention for the State Party concerned. Thereafter the States Parties shall submit supplementary reports every four years on any new measures taken and such other reports as the Committee may request. 2. The Secretary-General of the United Nations shall transmit the reports to all States Parties. 3. Each report shall be considered by the Committee which may make such general comments on the report as it 84