The Berlin/Bonn Act (German: Berlin/Bonn-Gesetz) regulated the move of the Bundestag and parts of the government of Germany from Bonn to Berlin.
The act was a consequence of the Hauptstadtbeschluss (English: Enactment regarding the capital) of 20 June 1991, which made Berlin the seat of government.
The Berlin/Bonn act determined which federal ministries moved to the capital and gave the city certain commitments regarding the preservation of Bonn as a location of politics.
This money was used to fund various compensation measures and concrete action plans like the foundation of the Bonn-Rhein-Sieg University of Applied Sciences.
According to the Federal Ministry of Finance, this division of government offices costs taxpayers at least 8.6 million euros each year, for example in flight fares for officials' business trips.