The Acetylene (Exemption) Order 1977
Whereas by an Order in Council (No. 30) dated 2nd February 1937(a), as amended(b), made under sections 43 and 104 of the Explosives Act 1875(c), it is declared that acetylene when liquid or when subject to a certain degree of compression or when in admixture with atmospheric air or oxygen gas, shall be deemed to be an explosive within the meaning of the said Act, and it is provided that if it is shown to the satisfaction of the Secretary of State that any such acetylene, when in admixture wit...