The assignment of an ISIL / library code does not automatically imply authorisation for the German interlibrary lending system. Instead a library must apply for authorisation at the interlibrary lending centre of the federal state or lending area. The centre informs us about authorisation or cancelation of a particular library.
The ISIL and Library Code Directory records the present state of authorisations of libraries for the German interlibrary lending system.
Lists can be displayed for entire Germany as well as for particular lending areas.
BAW Lending area Baden-Württemberg and Saarland
BAY Lending area Bayern
BER Lending area Berlin and Brandenburg
HAM Lending area GBV (Hamburg, Bremen, Schleswig-Holstein and
HES Lending area Hessen and parts of Rheinland-Pfalz
NIE Lending area GBV (Niedersachsen)
NRW Lending area Nordrhein-Westfalen and parts of Rheinland-Pfalz
SAA Lending area GBV (Sachsen-Anhalt)
SAX Lending area Sachsen
THU Lending area GBV (Thüringen)