Fissile radioactive material in any quantity shall not be accepted in the Russian Federation for carriage on passenger aircraft, and shall not be transported into the Russian Federation, from its territory or through its territory without prior permission from:

• Federal Environmental, Technological and Atomic Supervisory Body (ROSTECHNADZOR)
  Ul. Taganskaya, 34
  109147 Moscow
  Russia
  Telephone: 495-411-60-22
  Facsimile: 495-261-60-43

This variation covers fissile radioactive material and articles thereof containing uranium-233, uranium-235, plutonium and other isotopes of transuranic elements.