"State Committee of Defense Decree #6679s
October 10th, 1944
Moscow, Kremlin
On the installation of 520 hp V-11 engines into IS tanks and SPGs
The State Committee of Defense orders that:
The People's Commissariat of Tank Production is permitted to produce and install V-11 engines adjusted to the power of 520 hp at 2000 RPM into IS tanks and SPGs before trials of modernized tanks and SPGs with an improved cooling system are completed.
Chairman of the Committee of Defense, I. Stalin"