13. Guards of camp or garrison taken from the line.
14. All other guards mounted from the grand parade.
15. Guards of general officers, and the staff according to rank.
16. Pickets.
17. General fatigues.
18. Regimental police.
Should a tour of service occur while an officer is on any subordinate duty, he shall be relieved, but the tour on which he was engaged shall pass to his credit. If an officer’s tour for general court-martial, picket, or fatigue, occurs while he is on any other duty from the grand parade, he shall not be relieved, but is to stand for the next tour.
II. In all services by detachment, the corps are to furnish according to their strength, the longest off the first on; but in all cases of duty and of service where it may be found practicable, the troops are to operate by companies, battalions, or regiments.
III. Marching off the grand parade, or swearing in on general court-martial, is to pass for a tour of duty.
IV. Return detachments not to be excused from duty more than two days.