Administrative units - situation on January 1st corresponds to the dataset of administrative units from the reference database for the land register data. Administrative limits are legally defined by an administrative entity or between two administrative entities. In Belgium, administrative limits as legally defined are fixed and can only be changed by a law, ordinance or decree. The General Administration of Patrimonial Documentation of the FPS Finance is named by the federal authorities as the authentic source of Belgian administrative limits.

This dataset corresponds to the legal situation as defined on January 1st of the reference year. It is composed of seven geometric classes (polygons and lines) and one class without geometry. The first class corresponds to the whole national territory. The second corresponds to the territory of the three regions, the third to the territory of the provinces, the fourth to the territory of the administrative districts, the fifth to the territory of the municipalities, the sixth to the territory of the Antwerp city districts and the seventh to the administrative boundaries in the form of lines. The class without geometry corresponds to the table of tax situations. The dataset can be freely downloaded as a zipped shapefiles.