Purpose The purpose of this Directive is to lay down a general framework for combating discrimination on the grounds of religion or belief, disability, age or sexual orientation as regards employment and occupation, with a view to putting into effect in the Member States the principle of equal treatment. Article 2 Concept of discrimination 1. For the purposes of this Directive, the "principle of equal treatment" shall mean that there shall be no direct or indirect discrimination whatsoever on any of the grounds referred to in Article 1. 2. For the purposes of paragraph 1: (a) direct discrimination shall be taken to occur where one person is treated less favourably than another is, has been or would be treated in a comparable situation, on any of the grounds referred to in Article 1; (b) indirect discrimination shall be taken to occur where an apparently neutral provision, criterion or practice would put persons having a particular religion or belief, a particular disability, a particular age, or a particular sexual orientation at a particular disadvantage compared with other persons unless: (i) that provision, criterion or practice is objectively justified by a legitimate aim and the means of achieving that aim are appropriate and necessary, or (ii) as regards persons with a particular disability, the employer or any person or organisation to whom this Directive applies, is obliged, under national legislation, to take appropriate measures in line with the principles contained in Article 5 in order to eliminate disadvantages entailed by such provision, criterion or practice. 3. Harassment shall be deemed to be a form of discrimination within the meaning of paragraph 1, when unwanted conduct related to any of the grounds referred to in Article 1 takes place with the purpose or effect of violating the dignity of a person and of creating an intimidating, hostile, degrading, humiliating or offensive environment. In this context, the concept of harassment may be defined in accordance with the national laws and practice of the Member States. 4. An instruction to discriminate against persons on any of the grounds referred to in Article 1 shall be deemed to be discrimination within the meaning of paragraph 1. 5. This Directive shall be without prejudice to measures laid down by national law which, in a democratic society, are necessary for public security, for the maintenance of public order and the prevention of criminal offences, for the protection of health and for the protection of the rights and freedoms of others. Article 3 Scope 1. Within the limits of the areas of competence conferred on the Community, this Directive shall apply to all persons, as regards both the public and private sectors, including public bodies, in relation to: (a) conditions for access to employment, to self-employment or to occupation, including selection criteria and recruitment conditions, whatever the branch of activity and at all levels of the professional hierarchy, including promotion; (b) access to all types and to all levels of vocational guidance, vocational training, advanced vocational training and retraining, including practical work experience; (c) employment and working conditions, including dismissals and pay; (d) membership of, and involvement in, an organisation of workers or employers, or any organisation whose members carry on a particular profession, including the benefits provided for by such organisations. 2. This Directive does not cover differences of treatment based on nationality and is without prejudice to provisions and conditions relating to the entry into and residence of third-country nationals and stateless persons in the territory of Member States, and to any treatment which arises from the legal status of the third-country nationals and stateless persons concerned. 3. This Directive does not apply to payments of any kind made by state schemes or similar, including state social security or social protection schemes. 4. Member States may provide that this Directive, in so far as it relates to discrimination on the grounds of disability and age, shall not apply to the armed forces.