International Transport Regulations 26 1.5 Marking and Labelling Marking The UN number preceded by the letters "UN" shall be clearly and durably marked on each package. Dimension of the mark: – The UN number and the letters "UN" shall be at least 12 mm high – For packages of 30 litres capacity or less or of 30 kg maximum net mass, they shall be at least 6 mm in height and except for packages of 5 litres or 5 kg or less when they shall be of an appropriate size. – For marks in the form of specific wording, the lettering size shall be at least 12 mm high: • OVERPACK • DAMAGED/DEFECTIVE LITHIUM-ION BATTERIES or DAMAGED/DEFECTIVE LITHIUM METAL BATTERIES • LITHIUM BATTERIES FOR RECYCLING or LITHIUM BATTERIES FOR DISPOSAL Unpackaged article: • the marking shall be displayed on the article, on its cradle or on its handling, storage or launching device. Marking shall be readily visible and legible and shall be able to withstand open weather exposure without a substantial reduction in effectiveness; IMDG Code requires test of at least three months' immersion in the sea. Labelling Labels shall be in the form of a square set at an angle of 45° (diamond-shaped) with minimum dimensions of 100 mm by 100 mm, except in the case of packages of such dimensions that they can only bear smaller labels; this exception is not valid for air transport . They shall have a line 5 mm inside the edge and running parallel with it. Labels shall be readily visible and legible and shall be able to withstand open weather exposure without a substantial reduction in effectiveness; IMDG Code requires test of at least three months' immersion in the sea. Marks and labels used in this manual: Hazard Label Class 9A Minimum dimensions 100 x 100 mm
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