What must be obtained for the transport of weapons of war by air?

For the transport of weapons of war by air, it is essential to obtain approval from all states whose airspace will be used. This requirement is grounded in international law and aviation security protocols, which aim to ensure that all countries maintain oversight over the transit of potentially dangerous materials through their airspace. Each state has its own regulations regarding the transport of weapons, and they need to be informed and involved in the approval process to maintain security and compliance with international agreements.

When weapons are transported, especially military-grade or classified items, the implications can affect international relations and safety. Therefore, obtaining consent from every applicable country helps ensure that the actions taken do not conflict with legal or diplomatic standards and that all air travel adheres to safe practices.

In contrast, simply obtaining approval from one state, whether it be the departure location or another single state, would not comprehensively address the legalities surrounding the transport through additional jurisdictions. Similarly, the notion that no approval is needed if classified as sport does not align with international laws governing weapons transport, as the categorization of an item does not negate the necessity for proper authorization and oversight.