Each commune shall supply the Swiss Federal Statistical Office (FSO) each year with its data on residents as of 31 December by 31 January of the following year at the latest and shall update the National Register of Buildings and Dwellings (RBD) in accordance with Article 10 paragraph 1 of the Ordinance of 9 June 2017 2 on the Federal Register of Buildings and Dwellings. 3
In cantons with recognised registers of buildings and dwellings, the commune may also make its data on residents available to the canton to enable the automated identification of principal homes in the cantonal register of buildings and dwellings.