Administrative act effecting the release of radioactive substances and movable objects, of buildings, surfaces, facilities or facility parts which are activated or contaminated with radioactive substances and which originate from activities according to § 2 para. 1 no. 1 letters a, c or d Atomic Energy Act, from the regulating area a) of the Atomic Energy Act and B) legal ordinances based on this as well as administrative decisions on the use, utilisation, removal, owning or their forwarding to third parties as non-radioactive substances.