multi-manning
as defined in Regulation (EC) No 561/2006 of the European Parliament and of the Council of …, Article 4, point (o)
the situation where, during each period of driving between any two consecutive daily rest periods, or between a daily rest period and a weekly rest period, there are at least two drivers in the vehicle to do the driving. For the first hour of multi-manning the presence of another driver or drivers is optional but for the remainder of the period it is compulsory