1. For the purpose of these Principles, the terms “launching State” and “State launching” mean the State which exercises jurisdiction and control over a space object with nuclear power sources on board at a given point in time relevant to the principle concerned.

2. For the purpose of principle 9, the definition of the term “launching State” as contained in that principle is applicable.

3. For the purposes of principle 3, the terms “foreseeable” and “all possible” describe a class of events or circumstances whose overall probability of occurrence is such that it is considered to encompass only credible possibilities for purposes of safety analysis. The term “general concept of
defence-in-depth” when applied to nuclear power sources in outer space refers to the use of design features and mission operations in place of or in addition to active systems, to prevent or mitigate the consequences of system malfunctions. Redundant safety systems are not necessarily required
for each individual component to achieve this purpose. Given the special requirements of space use and of varied missions, no particular set of systems or features can be specified as essential to achieve this objective. For the purposes of paragraph 2 (d) of principle 3, the term “made
critical” does not include actions such as zero-power testing which are fundamental to ensuring system safety.