2. Sentinels when in sentry boxes stand at ease. Sentry boxes
will be used in wet weather only, or at other times when specially
authorized by the commanding officer.

163. In very hot weather, sentinels may be authorized to stand
at ease on their posts, provided they can effectively discharge
their duties in this position; but they will take advantage of
this privilege only on the express authority of the officer of
the day or the commander of the guard.

164. A mounted sentinel may dismount occasionally and lead his
horse, but will not relax his vigilance.

No. 3: To report all violations of orders I am instructed to enforce.

165. A sentinel will ordinarily report a violation of orders
when he is inspected or relieved, but if the case be urgent,
he will call the corporal of the guard, and also, if necessary,
will arrest the offender.

No. 4: To repeat all calls from posts more distant from the
guardhouse than my own.

166. To call the corporal of the guard for any purpose other
than relief, fire, or disorder (pars. 167 and 178), a sentinel
will call, "Corporal of the guard, No. (----)," adding the number
of his post. In no case will any sentinel call, "Never mind the
corporal"; nor will the corporal heed such call if given.

No. 5: To quit my post only when properly relieved.

167. If relief becomes necessary, by reason of sickness or other
cause, a sentinel will call, "Corporal of the guard, No. (----),
Relief," giving the number of his post.

168. Whenever a sentinel is to be relieved, he will halt, and
with arms at a right shoulder, will face toward the relief, when
it is 30 paces from him. He will come to a port arms with the
new sentinel, and in a low tone will transmit to him all the
special orders relating to the post and any other information
which will assist him to better perform his duties.

No. 6: To receive, obey, and pass on to the sentinel who relieves
me, all orders from the commanding officer, officer of the day,
and officers and noncommissioned officers of the guard only.

169. During his tour of duty a soldier is subject to the orders
of the commanding officer, officer of the day, and officers and
noncommissioned officers of the guard only; but any officer is
competent to investigate apparent violations of regulations by
members of the guard.

170. A sentinel will quit his piece on an explicit order from
any person from whom he lawfully receives orders while on post;
under