Officers of the Corps of Royal Artillery Drivers had no right of field command, all line officers outranked them and could issue commands to higher ranking corps officers on the battlefield. There was some controversy during the Napoleonic Wars as to whether officers in the corps should be allowed to freely transfer into the line infantry. It was commonplace, for example, for officers of the Royal Waggon Train to be promoted into line infantry regiments once they had accumulated sufficient years of service in their rank. A notable exception was a first lieutenant-commissary of the Corps of Royal Artillery Drivers who was granted special permission to become adjutant of the Ceylon Regiment in 1810.
