Administrative law is a branch of public law. It regulates the sovereign activity of the public administration and concerns thus in particular the legal relationship between the citizens and the state.
There is a distinction between general and special administrative law:
The first concerns the rules applicable to all areas of public administration, such as the administrative organization, the adoption and withdrawal of administrative acts and the administrative procedure.
In contrast, the special administrative law is tailored to special administrative tasks and is subdivided into numerous specialist areas such as: Municipal law including municipal tax law, trade law, police and security law as well as public construction law. In many areas, special administrative law is influenced or superimposed by European law.