PROPER ADDRESS
When military personnel greet each other, the one of lower rank is required to salute the officer of higher rank. The higher ranking officer can then decide whether to bow, nod, salute, or ignore the other. If two officers are of the same rank, they may bow, nod, or salute the other, and do the same in return. Superior officers can be addressed in one of two ways. Most formally, they are addressed by their rank. In less formal situations, they are addressed as "rekkhai" [sir], with the exception of social occasions, when they may be address by name. Inferior officers may be addressed by rank or name. Position, however, always outweighs rank, and one should be addressed as the position demands.