The amendment enters into force on 2016-07-01, and requires the following:
- Every ship to which chapter I applies shall carry an appropriate portable atmosphere testing instrument or instruments
- As a minimum, these shall be capable of measuring concentrations of oxygen, flammable gases or vapors, hydrogen sulphide and carbon monoxide prior to entry into enclosed spaces
- Suitable means shall be provided for the calibration of all such instruments. This implies that calibration shall be done in accordance with maker’s instructions and recorded.