Quorum and special majorities

a. It is advisable not to provide for:

i. a turn-out quorum (threshold, minimum percentage);
ii. an approval quorum (approval by a minimum percentage of registered voters).

b. An approval quorum or a specific majority requirement is acceptable for referendums on matters of fundamental constitutional significance.

c. The requirement of a multiple majority (the majority of voters taking part in the referendum plus the majority in a specified number of entities) is acceptable in federal and regional states, in particular for constitutional revisions.