User Guide to Thresholds and Classification - Environmental ...

30User Guide for Thresholds and ClassificationsThe restrictions explosive regulations placed on fireworks that could be approved for sale to the publicincluded:the composition was not to include chlorate mixed with sulphur, phosphorus, or any sulphide (unless itwas an amorce);the composition was not to include poisonous substances;the construction was not to allow any firework composition to escape;a firework must not contain its own means of ignition (unless it is an amorce, throw-down, snap, or bonboncracker);rockets were not to be projected erratically or unpredictably;rockets were not to have a sharp, pointed, rigid cone;a firework was not to be shaped as a hand-held firework (port fire or squib) if on ignition it commencedwith a discharge of fire and concluded with an explosion that burst the case;a firework was not to discharge hot or burning material onto the ground; andthe size and construction of cannons, bangers, and bungers were limited.The Explosives (Fireworks) Order 1990 removed cannons, bangers, and bungers or fireworks whoseprincipal effect was percussive. The Explosives (Skyrockets Restriction) Amendment Act 1994 removedrockets, tourbillions, and fireworks whose principal effect was vertical or horizontal flight.The provisions above are carried over as specific regulations under section 140(1)(R) of the HSNO Act in theHazardous Substances (Fireworks) Regulations 2001.2.5.5. British Home Office classificationWhile New Zealand has previously used the British Home Office classification together with the UNclassification system, it is considered that, increasingly, data on explosive substances would relate to UNtests and criteria for classification, and that using the British Home Office system with the UN classificationsystem would create confusion. Accordingly, the HSNO classification system for explosives uses only thesystem described in the UN Model Regulations.ReferencesUnited Nations 1994. European Agreement Concerning the International Carriage of Dangerous Goods byRoad United Nations, Geneva.United Nations 1999a. Recommendations on the Transport of Dangerous Goods Manual of Tests andCriteria 3rd revised edition. United Nations, United Nations, New York and Geneva. (Note: Equivalentmaterial can be found in more recent versions of this document, for example, the 4th revised edition. Somematerial is available for purchasing and downloading from http://www.unece.org/trans/danger/danger.htm.)United Nations 1999b. Recommendations on the Transport of Dangerous Goods Model Regulations 11threvised edition. United Nations, New York and Geneva. (Note: Equivalent material can be found in moreJanuary 2012 EPA0109