Article 13 Social dialogue 1. Member States shall, in accordance with their national traditions and practice, take adequate measures to promote dialogue between the social partners with a view to fostering equal treatment, including through the monitoring of workplace practices, collective agreements, codes of conduct and through research or exchange of experiences and good practices. 2. Where consistent with their national traditions and practice, Member States shall encourage the social partners, without prejudice to their autonomy, to conclude at the appropriate level agreements laying down anti-discrimination rules in the fields referred to in Article 3 which fall within the scope of collective bargaining. These agreements shall respect the minimum requirements laid down by this Directive and by the relevant national implementing measures. Article 14 Dialogue with non-governmental organisations Member States shall encourage dialogue with appropriate non-governmental organisations which have, in accordance with their national law and practice, a legitimate interest in contributing to the fight against discrimination on any of the grounds referred to in Article 1 with a view to promoting the principle of equal treatment. CHAPTER III PARTICULAR PROVISIONS Article 15 Northern Ireland 1. In order to tackle the under-representation of one of the major religious communities in the police service of Northern Ireland, differences in treatment regarding recruitment into that service, including its support staff, shall not constitute discrimination insofar as those differences in treatment are expressly authorised by national legislation. 2. In order to maintain a balance of opportunity in employment for teachers in Northern Ireland while furthering the reconciliation of historical divisions between the major religious communities there, the provisions on religion or belief in this Directive shall not apply to the recruitment of teachers in schools in Northern Ireland in so far as this is expressly authorised by national legislation. CHAPTER IV FINAL PROVISIONS Article 16 Compliance Member States shall take the necessary measures to ensure that: (a) any laws, regulations and administrative provisions contrary to the principle of equal treatment are abolished; (b) any provisions contrary to the principle of equal treatment which are included in contracts or collective agreements, internal rules of undertakings or rules governing the independent occupations and professions and workers' and employers' organisations are, or may be, declared null and void or are amended. Article 17 Sanctions Member States shall lay down the rules on sanctions applicable to infringements of the national provisions adopted pursuant to this Directive and shall take all measures necessary to ensure that they are applied. The sanctions, which may comprise the payment of compensation to the victim, must be effective, proportionate and dissuasive. Member States shall notify those provisions to the Commission by 2 December 2003 at the latest and shall notify it without delay of any subsequent amendment affecting them. Article 18 Implementation Member States shall adopt the laws, regulations and administrative provisions necessary to comply with