ENLatvia’s Constitution provides for mandatory referendums in two cases – one speaks to amending Sections 1, 2, 3, 4, 6 and 77 of the Constitution, which establish the fundamental aspects of the Republic of Latvia as an independent democracy, and the other refers to accession to the European Union. Compulsory constitutional referendums sometimes require a high level of voter participation (Lithuania, Romania), and in other cases they involve complicated procedures (Denmark). The aim is to limit attempts to amend a constitution or certain provisions therein, or even to make sure that some provisions cannot be revised at all. The compulsory referendum on EU membership in Latvia is unique in its specificity, because in other countries, regulations about the issue are far more flexible. Switzerland, Lithuania and Croatia, for instance, require mandatory referendums on accession to any international organisation or supranational community. Elsewhere, facultative referendums are held.