The Marking of Plastic Explosives for Detection Regulations 1996

1.  For the purposes of these Regulations “explosive” means an explosive substance, commonly known as a “plastic explosive”, including such substance in flexible or elastic sheet form and whether or not contained in an explosive article, which is—

(a) formulated with one or more high explosives which in their pure form have a vapour pressure less than 10⁻4 Pa at a temperature of 25°C;

(b) formulated with a binder material; and

(c) malleable or flexible at normal room temperature.