(4) The company clerk performs his duties with the regimental personnel group.
(5) The truck driver and mechanics drive ve- hicles (other than those driven by the bugler and messenger), which are assigned to company head- quarters and perform company maintenance on the organic vehicles of the company.
(6) During marches, the company administra- tion group and the company kitchen and baggage vehicles march with components of the kitchen and baggage train in the regimental motor column. Dur- ing combat, they usually bivouac and operate in that part of the regimental train bivouac assigned to the kitchen and baggage train.
REGIMENTAL HEADQUARTERS PLATOON.
Composition. The regimental headquarters pla-
toon consists of a staff section and a supply section.
b. Staff section. (1) The staff section consists of an operations group, an administration group, and a special service group.
(2) The operations group includes the orientation officer, the assistant regimental adjutant (warrant officer), the sergeant major, the operations ser- geant, a stenographer, and clerks. It provides the operating personnel for the adjutant (S-1) and the plans and training officer (S-3) at the regimental command post.
(a) The orientation officer, who is also a special service officer, is an assistant to the regimental S-3