Exception of emergencies

(1) The requirements for rest periods specified in regulation 9(5)(c) need not be maintained in the case of any emergency or drill or in other overriding operational conditions. Exceptions for (2) Without prejudice to the generality of subregulation (1), a master of ship or seaman may participate in a navigational, engine room machinery watch although he has not had the rest period provided by the schedule produced in pursuance of regulation 9, and the master may exceed, and a seaman may be required to exceed, the schedule’s work or duty periods, when in the opinion of the master it is necessary to meet an emergency threatening the safety of the ship or the life of any person or threatening damage to the environment.