Unless the subject or context requires otherwise, in these rules:- In relation to military bases and their subordinate units, units, habitable units, depots, departments and bases, their chiefs mean the various departments of the military bases, principal staff officers in the case of bases, Husband, in the case of a unit, the unit commander, in the case of a sub-unit, the commander of a regular unit, in the case of a depot, the depot commander, in the case of a department and bases, it should be understood as its chief.