Article 4
Occupational requirements 1. Notwithstanding Article 2(1) and (2), Member States may provide that a difference of treatment which is based on a characteristic related to any of the grounds referred to in Article 1 shall not constitute discrimination where, by reason of the nature of the particular occupational activities concerned or of the context in which they are carried out, such a characteristic constitutes a genuine and determining occupational requirement, provided that the objective is legitimate and the requirement is proportionate. 2. Member States may maintain national legislation in force at the date of adoption of this Directive or provide for future legislation incorporating national practices existing at the date of adoption of this Directive pursuant to which, in the case of occupational activities within churches and other public or private organisations the ethos of which is based on religion or belief, a difference of treatment based on a person's religion or belief shall not constitute discrimination where, by reason of the nature of these activities or of the context in which they are carried out, a person's religion or belief constitute a genuine, legitimate and justified occupational requirement, having regard to the organisation's ethos. This difference of treatment shall be implemented taking account of Member States' constitutional provisions and principles, as well as the general principles of Community law, and should not justify discrimination on another ground. Provided that its provisions are otherwise complied with, this Directive shall thus not prejudice the right of churches and other public or private organisations, the ethos of which is based on religion or belief, acting in conformity with national constitutions and laws, to require individuals working for them to act in good faith and with loyalty to the organisation's ethos.