"B. All Army personnel in uniform are required to salute when they meet and recognize persons entitled to the salute. Salutes will be exchanged between officers (commissioned and warrant) and enlisted personnel, and with personnel of the Armed Forces of the United States..."
On a more humorous note, I was in OCS before I ever saw my first warrant officer and hesitated in saluting. I should have observed the common wisdom: When in doubt, salute. The poor man simply cried, "My Gawd, don't they teach you bastards anything?" and stalked away.
Obviously, they didn't...
On another humorous note, let me tell you how we tormented the XO of our Basic Training Company, a newly minted 2LT just out of OCS. We posted lookouts every morning and then lined up to salute him as he made his way to the orderly room. We spaced ourselves just far enough apart that he had to return our salutes individually. Then we raced around the company to get back in line and salute him again. The poor guy took to parking far from the company area and tried to sneak in, but we always caught him. Actually, I have to thank him for helping me survive OCS. Every time I felt like quitting, I thought of him and said to myself, "If LT A____ could do it, so can I."
I love the grass issue, I personally take the most direct route to the location I am going. I heard a saying once from a CSM, "If God didn't want you walking on grass then he wouldn't have made it green."
Working in an Officer heavy location, I actually asked a MAJ I work with about the salute situation because sometimes I see officers salute each other and other times I do not. He told me if they work or know each other it is an unspoken norm to not salute.
4-16. Military courtesy shows respect and reflects self-discipline. Consistent and proper military courtesy is an indicator of unit discipline, as well. Soldiers demonstrate courtesy in the way we address officers or NCOs of superior rank. Some other simple but visible signs of respect and self-discipline are as follows:
When talking to an officer of superior rank, stand at attention until ordered otherwise.When you are dismissed, or when the officer departs, come to attention and salute.When speaking to or being addressed a noncommissioned officer of superior rank, stand at parade rest until ordered otherwise.When an officer of superior rank enters a room, the first soldier to recognize the officer calls personnel in the room to attention but does not salute. A salute indoors is rendered only when reporting.When an NCO of superior rank enters the room, the first soldier to recognize the NCO calls the room to "At ease."Walk on the left of an officer or NCO of superior rank.When entering or exiting a vehicle, the junior ranking soldier is the first to enter, and the senior in rank is the first to exit.When outdoors and approached by an NCO, you greet the NCO by saying, "Good morning, Sergeant," for example.The first person who sees an officer enter a dining facility gives the order "At ease," unless a more senior officer is already present. Many units extend this courtesy to senior NCOs, also.When you hear the command "At ease" in a dining facility, remain seated, silent and continue eating unless directed otherwise.


Officers
Customs and Courtesies
Army
Saluting
AR 600-25

