The initiative, entitled "Swiss Law, Not Foreign Judges" was launched by the national-conservative Swiss People's Party (SVP), which has the largest representation in the National Council, the lower house of the Swiss legislature.
The Swiss federal government does not support this idea, believing that in this case, the implementation of the European Convention on Human Rights and, in the worst case, the decisions of the European Court of Human Rights (ECHR) will be under threat.
If the proposals are approved in a referendum, the federal constitution will be recognised in Switzerland as the supreme source of law.
International human rights organisations, including Amnesty International, have voiced opposition to this referendum.
In 2012, a Swiss federal court decided that international law takes precedence.