Verfassungsänderung#

Constitutional Amendments: Amendments to the federal or provincial constitutional laws are subject to stricter quorum requirements than apply for the transaction of ordinary business in the legislative bodies ( Nationalrat (National Council), Landtage (provincial diets)); at the federal level: presence of half the members as opposed to one third for ordinary business, and a two-thirds majority vote as opposed to an absolute majority of votes; in addition, fundamental constitutional amendments (amendments to fundamental principles, Federal Constitution) have to be submitted to a Referendum.