What is "panachage"

Panachage is the name given to a procedure provided for in several open list variants of the party-list proportional representation system which gives voters more than one vote for the same ballot and allows them to distribute their votes between individual candidates from different party lists. It is used in elections at all levels in Liechtenstein, Luxembourg and Switzerland, in parliamentary elections in Ecuador, El Salvador and Honduras, as well as in local elections in a majority of German states and in French communes under 1,000 inhabitants.