- 24 - Article 19 88. This article provides for the possibility of limitations, restrictions or derogations. When the undertakings included in this framework Convention have an equivalent in other international legal instruments, in particular the ECHR, only the limitations, restrictions or derogations provided for in those instruments are allowed. When the undertakings set forth in this framework Convention have no equivalent in other international legal instruments, the only limitations, restrictions or derogations allowed are those which, included in other legal instruments (such as the ECHR) in respect of different undertakings, are relevant. SECTION III Article 20 89. Persons belonging to national minorities are required to respect the national constitution and other national legislation. However, this reference to national legislation clearly does not entitle Parties to ignore the provisions of the framework Convention. Persons belonging to national minorities must also respect the rights of others. In this regard, reference may be made to situations where persons belonging to national minorities are in a minority nationally but form a majority within one area of the State. Article 21 90. This provision stresses the importance of the fundamental principles of international law and specifies that the protection of persons belonging to national minorities must be in accordance with these principles. Article 22 91. This provision, which is based on Article 60 of the ECHR, sets out a well-known principle. The aim is to ensure that persons belonging to national minorities benefit from whichever of the relevant national or international human rights legislation is most favourable to them. Article 23 92. This provision deals with the relationship between the framework Convention and the Convention for the Protection of Human Rights and Fundamental Freedoms, reference to which is included in the Preamble. Under no circumstances can the framework Convention modify the rights and freedoms safeguarded in the Convention for the Protection of Human Rights and Fundamental Freedoms. On the contrary, rights and freedoms enshrined in the framework Convention which are the subject of a corresponding provision in the Convention for the Protection of Human Rights and Fundamental Freedoms must be interpreted in accordance with the latter.