1Short titleThis regulation may be cited as the Mining and Quarrying Safety and Health Amendment Regulation 2023.2Regulation amendedThis regulation amends the Mining and Quarrying Safety and Health Regulation 2017.3Amendment of sch 5 (General exposure limits for hazards)(1)Schedule 5, column 1, after ‘airborne contaminant’—insert—other than welding fumes, diesel particulate matter or respirable crystalline silica(2)Schedule 5—insert—respirable crystalline silica (quartz, cristobalite and tridymite)0.05mg/m³welding fumes5mg/m³