The following are not subject to these Instructions when carried as cargo: a) articles other than lamps, such as thermometers, switches and relays, each containing a total quantity of not more than 15 g of mercury or gallium, if they are installed as an integral part of a machine or apparatus and so fitted that shock or impact damage, leading to leakage of mercury or gallium, is unlikely to occur under normal conditions of transport. b) articles other than lamps, each containing not more than 100 mg of mercury, gallium or inert gas and packaged so that the quantity of mercury, gallium or inert gas per package is 1 g or less The words "not restricted" and the special provision number A69 must be provided on the air waybill when an air waybill is issued. Note.- For lamps containing dangerous goods, see Part 1;2.6.

Radiation detectors containing this gas in non-refillable cylinders not meeting the requirements of Part 6;5 and Packing Instruction 200 may be offered for transport under this entry provided: a) the working pressure in each cylinder does not exceed 50 bar; b) the cylinder capacity does not exceed 12 L; c) each cylinder has a minimum burst pressure of at least three times the working pressure when a relief device is fitted and at least four times the working pressure when no relief device is fitted; d) each cylinder is manufactured from material which will not fragment upon rupture; e) each detector is manufactured under a registered quality assurance programme; Note.- ISO 9001:2008 may be used for this purpose. f) detectors are transported in strong outer packagings. The complete package must be capable of withstanding a 1.2 m drop test without breakage of the detector or rupture of the outer packaging. Equipment that includes a detector must be packed in a strong outer packaging unless the detector is afforded equivalent protection by the equipment in which it is contained; and g) transport in accordance with this special provision must be noted on the dangerous goods transport document. Radiation detectors, including detectors in radiation detection systems, are not subject to any other requirements of these Instructions if the detectors meet the requirements in a) to f) above and the capacity of detector cylinders does not exceed 50 mL.