The rights and duties of nationals vary from state to state,[4] and are often complemented by citizenship law, in some contexts to the point where citizenship is synonymous with nationality.[5] However, nationality differs technically and legally from citizenship, which is a different legal relationship between a person and a country. The noun "national" can include both citizens and non-citizens. The most common distinguishing feature of citizenship is that citizens have the right to participate in the political life of the state, such as by voting or standing for election. However, in most modern countries all nationals are citizens of the state, and full citizens are always nationals of the state.[6]