Italy has both optional constitutional referendums and abrogative legislative referendums, at the request of part of the electorate (500,000 signatures are necessary). Parliament can, however, rule out a referendum by revising the basic principles and key content of the old law. Albania and Malta also have provision for abrogative legislative referendums. The system in the Russian Federation provides for a referendum at the request of 2,000,000 voters. This is more akin to a popular initiative, even though it may relate to a text already adopted as it is not suspensive.