The command parade rest may be given when in formation in what other position?

The command "parade rest" may be given while in the position of "attention" because this position requires the individual to stand fully upright, with feet together and arms at the sides. Transitioning from attention to parade rest allows personnel to adopt a more relaxed stance while remaining ready to respond to further commands or modifications in their marching instructions.

This command provides an opportunity for service members to ease the strain of standing for extended periods without compromising military readiness. It's essential for maintaining discipline and organization within a formation while allowing a slightly less formal posture, which is appropriate when the formation does not require complete, unwavering attention.

Other positions, such as "at ease" or "standing by," do not necessitate the transition to "parade rest," as those positions already imply a certain level of relaxation and do not call for the same attention-focused stance before the command can be given.