3 The following new regulation 7 is added after existing regulation 6:
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"Regulation 7 – Atmosphere testing instrument for enclosed spaces
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Every ship to which chapter I applies shall carry an appropriate
portable atmosphere testing instrument or instrumentsfootnote. As a minimum, these shall be capable
of measuring concentrations of oxygen, flammable gases or vapours, hydrogen
sulphide and carbon monoxide prior to entry into enclosed spacesfootnote. Instruments carried under other
requirements may satisfy this regulation. Suitable means shall be provided for
the calibration of all such instruments.