10.5.1: "...for the purpose of coaching his team." Standing silent is not coaching. Kneeling and watching the play is not coaching (and it's dangerous for the refs). Yelling at me is not coaching.

case 10.5.1.E: last sentence. "...if he/she wishes to stand when permitted under the optional coaching box privileges."

Furthermore, The Kansas State HS Activities Association announcements publication states "The head coach may: 1) Stand to instruct (coach) then, 2) sit down, 3) not kneel, squat, pace, or stand during a live ball."

Again, there is some leniency, but if the rule was intended that the head coach could remain standing the entire game, the rule would state, "While in the confines of the coaching box, the head coach may remain standing during all live ball situations." It doesn't. It states "for the purpose of coaching".