2.—(1) In this Order: –
“decay products” means, in relation to any radionuclide, the radionuclides succeeding it in the same radioactive series;
“natural gas” includes liquified petroleum gas;
“specified natural gas” means natural gas which contains radon-222, polonium 210, lead 210, and their decay products in concentrations which do not exceed 10 becquerels per gram for each radionuclide.
(2) The Interpretation Act (Northern Ireland) 1954(1) shall apply to this Order as it applies to a Measure of the Northern Ireland Assembly.