Article 65 of the Basic Law lets the Chancellor set the guidelines of policy. Then it says: Innerhalb dieser Richtlinien leitet jeder Bundesminister seinen Geschäftsbereich selbständig und unter eigener Verantwortung. Within these guidelines, each federal minister runs his portfolio independently and on his own responsibility. German government calls this the Ressortprinzip, the portfolio principle. When two ministers disagree, the federal government as a whole decides. The principle goes back to the Prussian reforms. They abolished the old cabinet system and created a state ministry nach dem Ressortprinzip klar gegliedert, clearly organized by portfolio. The ministers for the interior, foreign affairs, finance, justice and war each answered to the king.