Here.
An excerpt:
In many ways, the German association is drawing on the experiences of museums in Britain and the United States, which started facing claims for the repatriation of human remains decades ago. The Smithsonian began to repatriate American Indian bones in the late 1980s, and in 1990 the United States passed legislation to enforce the return of those remains by museums that benefit from federal funds. The Smithsonian independently returned remains to Australia in 2008 and 2010.
However, a report in 2011 from the Government Accountability Office still urged new measures to speed up the Smithsonian’s work, because by then it had returned only 5,000 remains, about one-third of its collection of such material.