The state road commissioner or warden shall in all cases where convicts or prisoners are under his control and supervision have authority to return any convict or prisoner to the penitentiary who because of mental or physical infirmity is unable to work, or whose presence in the camp, due to insubordination, bad conduct or disposition may impair the discipline of the road force.
Under the supervision of the warden, or rules promulgated for the government and discipline of the state convict road force approved by him such force, or so many thereof as appear eligible and trustworthy, shall be made trusties; but reasonable corrective measures may be taken against trusties who violate their privileges as such.