(a) before any measurements are taken or tests are performed under this Part, the instruments used to take these measurements or perform these tests have been calibrated and tested in accordance with the manufacturer’s specifications,

(b) the ventilation equipment and equipment used to test the air quality of an underground mine under this Part are calibrated and tested in accordance with the manufacturer’s specifications, and

(c) a person who takes the measurements, performs the tests and calibrates and tests the instruments and equipment under this Part is competent or is supervised by a competent person.