Where a time-limit is stipulated, it varies considerably: just 15 days in Croatia, 45 in Russia, 3 months in Lithuania, 3 months for legislative referendums and 6 months for constitutional referendums in “the former Yugoslav Republic of Macedonia”, 4 months in Hungary, 100 days for ordinary optional referendums and 18 months for popular initiatives in Switzerland.  In Italy, the time-limit is 3 months for constitutional referendums while abrogative legislative referendums can be called for between January 1 and September 30. In the Netherlands (according to the temporary law), signatures were not collected as such, and electors signed referendum applications in their town hall; the introductory application (40,000 signatures) must be filed within 3 weeks and the final application (600,000 signatures) within 6 weeks following the date on which the introductory application was declared valid.