European Social Charter (revised), 1996, Part V Article E, and Appendix Articles 21.4 and 24.3 (d)
Part V
Article E - Non-discrimination
The enjoyment of the rights set forth in this Charter shall be secured without discrimination on any ground such as race, colour, sex, language, religion, political or other opinion, national extraction or social origin, health, association with a national minority, birth or other status.
Articles 21
4. It is understood that religious communities and their institutions may be excluded from the application of these articles, even if these institutions are "undertakings" within the meaning of paragraph 3. Establishments pursuing activities which are inspired by certain ideals or guided by certain moral concepts, ideals and concepts which are protected by national legislation, may be excluded from the application of these articles to such an extent as is necessary to protect the orientation of the undertaking.
Article 24
3. For the purpose of this article the following, in particular, shall not constitute valid reasons for termination of employment:
(d) race, colour, sex, marital status, family responsibilities, pregnancy, religion, political opinion, national extraction or social origin;