This unit describes the skills required to maintain cartridge operated fire extinguisher systems to requirements as specified by Defence or the original equipment manufacturer. This includes the identification and selection of tools and equipment, the application of organisational safety requirements and appropriate legislative and regulatory requirements.This unit applies to those required to maintain cartridge operated fire extinguisher systems to requirements as specified by Defence or the original equipment manufacturer.The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to.Those undertaking this unit would work independently and as part of a team, under direct and/or indirect supervision, use discretion and judgement, and take responsibility for the quality of their output. They would perform specific tasks in a range of contexts.No licensing, legislative or certification requirements apply to unit at the time of publication.