Infrastructure tools to support an effective radiation oncology learning health system

City of federal subject significance is an administrative division of a federal subject of Russia which is equal in status to a district but is organized around a large city; occasionally with surrounding rural territories.^{[citation needed]}

According to the 1993 Constitution of Russia, the administrative-territorial structure of the federal subjects is not identified as the responsibility of the federal government or as the joint responsibility of the federal government and the federal subjects.^[1] This state of the matters is traditionally interpreted by the governments of the federal subjects as a sign that the matters of the administrative-territorial divisions are the sole responsibility of the federal subjects themselves.^[1] As a result, the modern administrative-territorial structures of the federal subjects vary significantly from one federal subject to another; that includes the manner in which the cities of federal subject significance are organized and the choice of a term to refer to such entities. In the federal subjects which have closed administrative-territorial formations, those are often given a similar status. Occasionally, this status is also given to the areas organized around the inhabited localities which are not cities, but smaller urban-type settlements.

As of 2013, the following types of such entities are recognized: