Council for German Orthography

The Rat für deutsche Rechtschreibung, or RdR, is the main international body regulating Standard High German orthography.
With its seat being in Mannheim, Germany, the RdR was formed in 2004 as a successor to the Zwischenstaatliche Kommission für deutsche Rechtschreibung in order to include both supporters and opponents of the German orthography reform of 1996.
Currently the RdR is composed of 41 members from those states and regions in the German Sprachraum:

Despite having German as one of its official languages, Luxembourg, which was not involved in devising the reform of 1996, is not a full member of the council. The government of Luxembourg unilaterally adopted the reform. According to the duchy's largest newspaper, the Luxemburger Wort, Luxembourg does not perceive itself as a "German-speaking country" and thus had no right to take part in the council. Despite this, Luxembourg takes part in the annual meetings of German-speaking countries. Furthermore, Luxembourg participates in La Francophonie and has members in the Académie française, despite French being only a co-official language, just like German.
The chairman of the Gesellschaft für deutsche Sprache is a member of the council. In 2003, the RdR, the GfdS, the Goethe-Institut and the Institute of the German Language, founded the German Language Council, which was later also joined by the German Academic Exchange Service.