Croat federal unit in Bosnia and Herzegovina, or Croat entity, also informally known as the "Third entity" (Serbo-Croatian: Hrvatska federalna jedinica, Hrvatski entitet, Treći entitet), is a proposed administrative unit in Bosnia and Herzegovina based on territorial federalism and ethnic self-determination. The proposal has been invoked by several political scientists, politicians and political parties, including the Croat National Assembly (HDZ BiH, HDZ 1990 and HSS). So far it has not been discussed beyond the concept level. Since the country is divided into two entities, the Serb-dominated Republika Srpska and the Bosniak-majority Federation, Croats, as one of the three equal constitutive nations, have proposed creating a symmetrical Croat-majority territorial unit. Political advocates