Which of the following is NOT a rest position that can be given at the halt?

The position of "Stand At Attention” is not considered a rest position that can be given at the halt. Instead, it is a position of strict military discipline in which service members maintain a state of readiness. In this position, individuals stand straight and still, with their arms at their sides and feet together, demonstrating alertness and readiness to respond.

On the other hand, "At Ease," "Rest," and "Parade Rest" are all positions that allow for relaxation while still maintaining some formal posture. "At Ease" permits slight movement and talking but requires members to remain in place. "Rest" allows for a more comfortable stance but has specific guidelines to follow. "Parade Rest" is a formal position where individuals stand with their feet apart and hands behind their backs, showing respect while still allowing for some ease compared to the strictness of "Attention." Each of these positions serves a purpose in military formations, enabling troops to take brief periods of relaxation while remaining in formation and attentive to commands.