"For the purpose of protecting the interests of the population of the Soviet zone of occupation of Germany and of the Greater Berlin area and of preventing economic dislocation through the separate actions of the Western Powers, the Soviet military administration in Germany will also adopt other necessary measures arising out of the present situation. The Soviet military administration in Germany feels certain that the German population will support its measures and will take the necessary steps to overcome difficulties, to raise the level of economy and strengthen currency circulation in the Soviet occupation zone of Germany"
January 1, 1970
https://en.wikiquote.org/wiki/Vasily_Sokolovsky