ICCPR

Art. 18 (1) : "Everyone shall have the right to freedom of thought, conscience and religion. This right shall include freedom [.] either individually or in community with others and in public or private, to manifest his religion or belief in worship, observance, practice and teaching."

Art. 18 (3) : "Freedom to manifest one's religion or beliefs may be subject only to such limitations as are prescribed by law and are necessary to protect public safety, order, health, or morals or the fundamental rights and freedoms of others."

1981 Declaration of the General Assembly

Art. 1 (1) : "Everyone shall have the right to freedom of thought, conscience and religion. This right shall include freedom to have a religion or whatever belief of his choice, and freedom, either individually or in community with others and in public or private, to manifest his religion or belief in worship, observance, practice and teaching."

Art. 1 (3) : "Freedom to manifest one's religion or belief may be subject only to such limitations as are prescribed by law and are necessary to protect public safety, order, health or morals or the fundamental rights and freedoms of others."

Human Rights Committee general comment 22

Para . 4 : "The freedom to manifest religion or belief in worship, observance, practice and teaching encompasses a broad range of acts. The concept of worship extends to ritual and ceremonial acts giving direct expression to belief, as well as various practices integral to such acts, including the building of places of worship, the use of ritual formulae, and objects, the display of symbols, and the observance of holidays and days of rest. The observance and practice of religion or belief may include not only ceremonial acts but also such customs as the observance of dietary regulations, the wearing of distinctive clothing or head coverings, participation in rituals associated with certain stages of life, and the use of a particular language, customarily spoken by a group. In addition, the practice and teaching of religion or belief includes acts integral to the conduct by religious groups of their basic affairs, such as freedom to choose their religious leaders, priests and teachers, the freedom to establish seminaries or religious schools and the freedom to prepare and distribute religious texts or publications."