The limits defined should as far as practicable be observed.
However, an exception maybe considered so long as they are agreed
between the Master, crew members and designated person ashore (if
applicable), and provided that their health and safety, and the safety
of the vessel, is not compromised. Exceptions from the weekly rest
period provided for in paragraph 26.1.6 should not be allowed for
more than two consecutive weeks. The intervals between two periods
of exceptions on board should not be less than twice the duration
of the exception.
When considering whether an exception is appropriate, the Master
should give due regard to the associated duties being considered and
in this respect exceptions to persons undertaking watch keeping duties
and/or with safety critical duties would not be considered appropriate.
In allowing any such agreed exception and to ensure that a crew
member does not become fatigued, such exceptions should be documented
and accompanied by commensurate rest arrangements.