A coalition committee is an informal body composed of leading figures from the coalition parties and the government. Coalition committees, in contrast to parliamentary committees, have no formal authority granted to them by constitution or legislation. Coalition committees are common in Western European countries; in Germany, they have existed with interruptions since the Kressbronn Circle of the first Grand Coalition (1966–1969). Coalition committees are also sometimes found in Germany at the level of the federal states. A coalition committee coordinates cooperation between coalition partners. The committee operation is frequently defined in the coalition agreement: for example, committee meetings can be scheduled either regularly or only in the event of particular differences between the actors involved. In practice, ad hoc committee meetings have also occurred. Members of coalition committees are usually representatives of the government, the parliamentary groups, and the parties supporting the government.