The Constitutional Law Branch bears primary responsibility for advising the government on constitutional matters and conducting constitutional litigation on behalf of the government. Constitutional issues arise across the full range of matters in which the government is involved. They include the protections found under the Canadian Charter of Rights and Freedoms such as freedom of religion, expression, association and assembly, rights relating to equality, democratic elections, mobility of persons, the use of official languages in federal institutions and in education, as well as the rights held by an individual when faced with government or police investigation and prosecution. Constitutional issues also include disputes respecting the division of powers between the federal Parliament and provincial legislatures and the protection of aboriginal and treaty rights.