6.A.1.Detonators and multipoint initiation systems, as follows:

a. Electrically driven explosive detonators, as follows:
1. Exploding bridge (EB);
2. Exploding bridge wire (EBW);
3. Slapper;
4. Exploding foil initiators (EFI);
b. Arrangements using single or multiple detonators designed to nearly simultaneously initiate an explosive surface over an area greater than 5000 mm² from a single firing signal with an initiation timing spread over the surface of less than 2.5 µs.
Note: Item 6.A.1. does not control detonators using only primary explosives, such as lead azide.
Technical Note: In Item 6.A.1. the detonators of concern all utilise a small electrical conductor (bridge, bridge wire, or foil) that explosively vapourises when a fast, high-current electrical pulse is passed through it. In nonslapper types, the exploding conductor starts a chemical detonation in a contacting highexplosive material such as PETN (pentaerythritoltetranitrate). In slapper detonators, the explosive vapourisation of the electrical conductor drives a flyer or slapper across a gap, and the impact of the slapper on an explosive starts a chemical detonation. The slapper in some designs is driven by magnetic force. The term exploding foil detonator may refer to either an EB or a slapper-type detonator. Also, the word initiator is sometimes used in place of the word detonator.