Sets out requirements for overhaul, repair or modification of electrical equipment for use in hazardous areas as defined by AS 2430 in Australia and NZS 6101 in New Zealand and protected by flameproof enclosures, intrinsic safety, increased safety, pressurization, non-sparking and dust-excluding ignition-proof techniques. It covers Group I coalmining and Group II non-coalmining industries, including Class II combustible dust equipment. It includes details for overhaul, repair, examination and testing as well as requirements for competent persons and repair and overhaul workshops.