(1) The site senior executive must ensure a person is not exposed to—(a) an atmosphere in a confined space on the surface of the mine that has—(i) an oxygen content of less than 19.5% by volume; or(ii) an oxygen content of more than 23.5% by volume; or(b) an atmosphere in any other part of the mine that has an oxygen content of less than 18% by volume.
(2) In this section—
"confined space" means a confined space as defined in AS 2865 ‘Confined Spaces’.