The following page covers the official standards for rendering courtesy in the Star Army of Yamatai.
Bowing is a part of Yamataian culture and is acceptable for everyone, in and out of uniform.
Saluting is a military-only gesture of courtesy only rendered to officers in uniform (and to the flag). In most cases bowing is also acceptable.
*With these it is fine to substitute a bow
The right hand is brought to upwards in a crisp motion so that the top of the forefinger is positioned at the outer edge of the right eyebrow and/or the bottom of the cap. Fingers should be together. The hand should be positioned flat, in line with the forearm, and tilted slightly forward. The upper arm should be parallel to the ground.