Fundamental Rights
(1) Subject to public order, morality and health and to the other provisions of this Part, all persons are equally entitled to freedom of conscience and the right freely to profess, practise and propagate religion. (2) Nothing in this article shall affect the operation of any existing law or prevent the State from making any law - (a) regulating or restricting any economic, financial, political or other secular activity which may be associated with religious practice; (b) providing for social welfare and reform or the throwing open of Hindu religious institutions of a public character to all classes and sections of Hindus. Explanation I: The wearing and carrying of kirpans shall be deemed to be included in the profession of the Sikh religion. Explanation II: References to Hindus in sub-clause (b) include persons professing the Sikh, Jain, or Buddhist religion.
Every person (not just citizens) in India has the freedom to hold their own beliefs, and to practise and spread their religion, subject to public order, morality, health, and other Fundamental Rights. The government can still regulate secular activities connected to religion (like the business/financial side of a religious institution) and can open Hindu religious institutions to all sections of Hindus, including Sikhs, Jains, and Buddhists for this purpose.
A person cannot be barred from a public sector job or service purely for practising a minority religion - but a religious institution's purely commercial/financial operations (like a trust's investment activities) can still be regulated by ordinary law under Article 25(2)(a).