Paragraph 12

The explosive substance Nitrogen Triiodide with the chemical formulation NI₃, in a quantity not exceeding 0.5 grams which has been manufactured for, and is used for, demonstration purposes as part of an educational activity within the meaning of section 1(3) of the Further Education Act 1985 M1 and either it is wholly used up in the demonstration or any amount remaining is destroyed immediately after it.