1. Each State Party shall submit to the Committee, through the Secretary-General of the United Nations, a comprehensive report on measures taken to give effect to its obligations under the present Convention and on the progress made in that regard, within two years after the entry into force of the present Convention for the State Party concerned.
2. Thereafter, States Parties shall submit subsequent reports at least every four years and further whenever the Committee so requests.
3. The Committee shall decide any guidelines applicable to the content of the reports.
4. A State Party which has submitted a comprehensive initial report to the Committee need not, in its subsequent reports, repeat information previously provided. When preparing reports to the Committee, States Parties are invited to consider doing so in an open and transparent process and to give due consideration to the provision set out in article 4.3 of the present Convention.
5. Reports may indicate factors and difficulties affecting the degree of fulfilment of obligations under the present Convention.