In the light of its benefits,  single-sex education has been endorsed by different international treaties of reference in educational matters and specific legislation from various countries of the OECD

UNESCO

Unesco determines that "creating or maintaining systems or educational institutions separated for male and  female students "is not discriminatory. (Art.2 of the Convention on the fight against discrimination in the field of education, 14 December 1960, ratified in 1999 by the Committee on Economic, Social and Cultural rights of the United Nations)

UNITED NATIONS

Article2, above , was ratified by the Committee on Economic, Social and Cultural rights of the United Nations in 1999

Universal declaration of human rights

Article 26,3: “Parents have a prior right to choose the kind of education that shall be given to their children”

Endorsed by European Union countries

• The Directive of the Council of the European Union 2004/113/EC, of December 13, 2004 on the Principle of Equality of treatment between men and women in access to goods, services and supplies, excludes from its scope of application to the media, advertising, and education public and private ( considering 13 and article3.3)
  

Consistent with the fundamental rights of the European Union

• The Charter of the Fundamental Rights of the European Union (article 14.3) recognizes freedom of  creation of educational institutions and the right of families to educate their children according to their own pedagogical convictions.
  

Supported by the educational laws

• Countries such as France, Italy, Germany or Belgium apply this Directive by ratifying the legitimacy of single-sex education.
  

France passed the law n ° 2012-954 in August 2012, which transposes several provisions of Community law in the field of the fight against discrimination and establishes the validity of single-sex education  as a pedagogical model and refuses to be discriminatory.