E/GN.4/1990/46 page 62 Commission on Human Rights or its Sub-commission on Prevention of Discrimination and Protection of Minorities, an open-ended working group to consider the possibility of preparing a new binding international instrument. In his view, such a group should be able to count on the broad participation of States, non-governmental organizations and religious denominations. While such an international instrument is being prepared, the Commission on Human Rights should endeavour to maintain its vigilance and continue to apply the procedure it has introduced with a view to monitoring and, if possible, reducing incidents and measures inconsistent with the provisions of the 1981 Declaration. 119. In this connection, the Special Rapporteur has noted with interest the report (E/CN.4/Sub.2/1989/32) prepared by Mr. Theo van Boven, expert of the Sub-Commission on Prevention of Discrimination and Protection of Minorities, pursuant to Commission to resolution 1988/55. In relation to the new binding international instrument itself, Mr. van Boven stresses that it should build on the standards already elaborated by the international community; take into account the complexity of the issues involved and, in particular, the need for broad international acceptance on the part of States which would have to undertake legal obligations. 120. The Special Rapporteur wishes once more to urge States which have not already ratified the relevant international instruments to do so, making provision, in accordance with the norms laid down by those instruments, for the necessary constitutional and legal guarantees for freedom of thought, conscience, religion and belief, including effective remedies in the event of intolerance or discrimination based on religion or belief. 121. Advantage should be taken of the advisory services made available by the United Nations in the field of human rights, as follows: (a) Provision of expert advisory services to countries which express the desire to have them for the drafting of new legislative provisions or the adaptation of existing legislation in conformity with the principles set out in the 1981 Declaration; for the establishment of a machinery for the promotion and protection of human rights, particularly in respect of freedom of religion and belief, such as national commissions, the institution of an ombudsman or of reconciliation commissions; or for the inclusion in school curricula of teaching of the ideals of tolerance, understanding and mutual respect among all religious groups; (b) Organization of regional, subregional and national training courses aimed at greater familiarization with existing principles, norms and remedies in the sphere of freedom of religion and belief. These training courses would be particularly intended for persons occupying key posts in their respective countries, such as legislators, judges, lawyers, law-enforcement officials, members of the administration and educators; (c) Organization of international, regional and national workshops for representatives of non-governmental organizations in the sphere of human rights, and for representatives of specific religions and ideologies, on the theme of promotion of tolerance and understanding as regards religion and belief and encouragement of inter-denominational dialogue;