On March 1, 2008, HafenCity was declared to be a separate district through the Law Concerning the Spatial Division of the Free and Hanseatic City of Hamburg (Gesetz über die räumliche Gliederung der Freien und Hansestadt Hamburg) - RäumGlG. It is composed of the former harbor of Großen Grasbrooks as well as the warehouse district on the islands of Kehrwieder and Wandrahm. Together, this borders the districts of Altstadt, Rothenburgsort, and the former district of Klostertor.The exact border delineation of both parts of the new district were established on February 20, 2007 through a decree of the Senate. Five years prior, on January 1, 2003, the area was removed from the duty-free zone of Hamburg to allow construction of housing and associated infrastructure.Because of the new division, the Speicherstadt (Warehouse District) now belongs to the administrative region of the northern part of HafenCity instead of part of the Altstadt. However, the term HafenCity is primarily used to refer to the area of city development, whereas Speicherstadt is seen as a separate quarter.