Law passed by the Reich government on 14 July 1933 legitimized 'the revocation of naturalizations and the annulment of German citizenship.' The law fulfilled an important promise that had formed part of the Nazi party manifesto as early as 1920. The new law specifically targeted Jews who had immigrated to the German Reich from eastern European countries. In the implementing order, the Reich Ministry of the Interior spelled out the racist and anti-Semitic thrust of the legislation: 'The assessment of whether a naturalization should be regarded as undesirable is made according to volkisch-national (and racial) principles.' The Ostjuden--'Eastern Jews'--were explicitly named as a group of people for whom the revocation of naturalization should 'particularly' be considered.