GIR1. HEADING 90.30 COVERS INSTRUMENTS AND APPARATUS FOR MEASURING OR DETECTING ALPHA, BETA, GAMMA, X-RAY, COSMIC OR OTHER IONISING RADIATIONS: GIR6. TERMS OF ONE-DASH SUBHEADING 9030.10, COVERS INSTRUMENTS AND APPARATUS FOR MEASURING OR DETECTING IONISING RADIATIONS: TERMS OF TWO-DASH SUBHEADING 903010.90, OTHER THAN FOR USE IN CIVIL AIRCRAFT.