Art. 31

1. This Act is subject to an optional referendum.
2. The Federal Council shall determine the date when this Act comes into force.

Commencement date:¹1 January 2018
Art. 1 para. 5, 5–13, 18, 20 paras 3, 22–26, 27 paras 2–6 and 28: 1 Jan. 2017