The Czech Republic, Russia and Hungary have the most stringent legislation. In the Czech Republic, a decision adopted by referendum can be modified only by another referendum, after a period of 24 months. In Russia, a question submitted to referendum can be reopened only after two or five years, depending on the circumstances, and by referendum; the rule submitted to referendum can, however, provide for a different procedure. In Hungary, if a quarter of voters supported or opposed the proposal, the matter can be addressed only by a new referendum, after a period of one year. In Croatia, on the other hand, the prohibition on reversing  a decision taken by referendum without holding a fresh referendum applies for just one year.