[1] An extraordinary court is the Extraordinary Chambers in the Courts of Cambodia, which is basically a chamber in the national court of Cambodia that is specially designed to judge crimes of the Khmer Rouge such as the Cambodian genocide, but its judges are not of the ordinary Cambodian judiciary but are selected among international candidates nominated by Secretary-General of the United Nations, according to an agreement between United Nations and the Cambodian government.
In that way, Article 101(1) of the Constitution is explained as forbidding establishment of both extraordinary court and special courtas, which are substantially the same concept.
[4] As the Constitution bans judgments by irregularly-composed judges, courts in the City of Kempten with special jurisdiction on military justice in Germany are also constituted by ordinary judges, according to Section 11a of German Criminal Code.
There are also military courts designed to judicially try members of enemy forces during wartime, operating outside the scope of conventional criminal and civil proceedings.
These were most recently created under the George W. Bush administration and authorized by the Military Commissions Acts under the Bush and Obama administrations to assert jurisdiction over terror suspects designated as unlawful enemy combatants.