States of Germany equivalent to those of the ministers in the larger states. The equivalent of the minister-president is the "Senatspräsident" (president of the senate) in Bremen, the "Erster Bürgermeister" (first mayor) in Hamburg, and the "Regierender Bürgermeister" (governing mayor) in Berlin. The parliament for Berlin is called the "Abgeordnetenhaus" (House of Representatives), while Bremen and Hamburg both have a "Bürgerschaft". The parliaments in the remaining 13 states are referred to as "Landtag" (State Parliament). The city-states of Berlin and Hamburg are subdivided into boroughs. The City of Bremen consists of two urban districts: Bremen and Bremerhaven, which are not contiguous. In the
States of Germany thus applied to the entire German people. Article 23, which had allowed "any other parts of Germany" to join, was rephrased. It had been used in 1957 to reintegrate the Saar Protectorate as the Saarland into the Federal Republic, and this was used as a model for German reunification in 1990. The amended article now defines the participation of the Federal Council and the 16 German states in matters concerning the European Union. The German states can conclude treaties with foreign countries in matters within their own sphere of competence and with the consent of the Federal Government (Article 32