This unit involves the skills and knowledge required to conduct an audit of classified hazardous areas (e.g. where flammable gas or vapour hazards or explosive dust atmospheres and combustible dust layers have the potential to be, or are present), and the explosion-protection aspects of the related electrical installation, which include electrical, instrumentation, control and/or communications equipment and installations. It includes: reviewing the processes given for the hazardous area and its compatibility with the classification documentation held in the verification dossier; determining by the use of various tools or resources (e.g. construction or maintenance systems, facility documentation), or by inspection whether equipment or systems are compliant for the area in which they are installed including wiring systems; evaluating the currency of documentation held in the verification dossier; and reporting audit results, including recommendations for remediation of non-compliance and required updating of the verification dossier or documents that support the verification dossier. This unit applies to personnel required to audit areas that have been classified as hazardous in reference to AS/NZS60079.10.2 or equivalent. The auditing task itself would apply to the various lifecycle phases of an installation. It is appropriate for personnel that are required to complete some, or all, of the responsibilities required of 'The Person with Executive Function' (TPEF), as described in AS/NZS60079.17:2017, for example, where the continuous supervision maintenance strategy has been adopted, and there is a need to analyse or verify the effectiveness of the continuous supervision process.Site-specific work permits may be required to work in the hazardous environment. In addition, other permits may be required, such as confined space and to operate specific pieces of equipment such as elevated work platforms in various jurisdictions. Before any audit is planned, these conditions of control are to be considered. Additional and/or other conditions may apply in some jurisdictions subject to regulations related to electrical work. Practice in the workplace and during training is also subject to work health and safety (WHS)/occupational health and safety (OHS) regulations.This unit of competency and associated assessment requirements is adopted from clause 2.14 of AS/NZS 4761.1:2018 Competencies for working with electrical equipment for hazardous areas (EEHA). There may be differences between the content of this unit and AS/NZS 4761.1:2018, so the Standard must be checked to ensure compliance with it. Clause 2.14 of AS/NZS 4761.1:2018 also includes the following precondition for assessment:"A candidate seeking assessment in this unit shall have been deemed competent to audit compliance of electrotechnology systems at AQF level 4 or NZQF level 5 (BD) or equivalent."