E/C.12/ROU/CO/3-5 (g) Take into consideration the Committee’s general comment No. 13 (1999) on the right to education. Linguistic and cultural rights of national minorities (art. 15) 24. The Committee notes with concern the limited availability of publications and television and radio programmes in minority languages and about national minorities, their history and their culture. The Committee recommends that the State party create favourable conditions to enable national minorities to express and develop their culture, traditions and customs in their own language. It also recommends that additional measures be taken in the field of education and information to encourage knowledge of the history, traditions and culture of various groups, including the Roma community, living in the State party. D. Other recommendations 25. While welcoming the contribution of the State party to official development assistance, the Committee encourages the State party to gradually increase its official development assistance with a view to achieving the international commitment of 0.7 per cent of its gross national product (GNP) and to pursue a human rights-based approach in its development cooperation policy, fully incorporating the rights contained in the Covenant. 26. The Committee recommends that the State party establish a statistical data collection system to assess the level of enjoyment of economic, social and cultural rights by disadvantaged and marginalized individuals and groups, including but not limited to Roma and persons with disabilities. In so doing, the State party should ensure due respect for the principles of confidentiality, informed consent and voluntary self-identification of persons as belonging to a particular group. 27. The Committee encourages the State party to consider signing and ratifying the Optional Protocol to the International Covenant on Economic, Social and Cultural Rights, the International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families, and ratifying the International Convention for the Protection of All Persons from Enforced Disappearance. 28. The Committee requests the State party to disseminate the present concluding observations widely at all levels of society, particularly among government officials, parliamentarians, judicial authorities and civil society organizations, and to inform the Committee on all steps taken to implement them in its next periodic report. It also encourages the State party to engage non-governmental organizations and other members of civil society in the process of discussion at the national level prior to the submission of its next periodic report. 29. The Committee invites the State party to update its common core document, as necessary, in accordance with the harmonized guidelines on reporting under the international human rights treaties (HRI/GEN/2/Rev.6, chap. I). 30. The Committee requests the State party to submit its sixth periodic report in accordance with the guidelines adopted by the Committee in 2008 (E/C.12/2008/2), by 30 November 2019. 9