In most states, the vote takes place over one day in the Czech Republic over two days. Finland schedules two days if the referendum is held at the same time as the national elections. The vote can also take place over one or two days in Poland. By definition, when advance or postal voting is allowed, it takes place before the actual polling day. For example, postal voting takes place over a period of thirty days in Sweden and three weeks before polling day in Switzerland. In Estonia, advance voting may take place at the polling stations from thirteen days before the election (moreover, electronic voting between four and six days before the election will be allowed from 2005). Advance voting is permitted by Russian law for fifteen days in the case of less accessible localities, boats, polar stations and, more generally, everywhere outside the national territory.