2017-18 NFHS Interpretations, Pt.2

[SC Official]

According to the NFHS Preseason Guide, it is improper to warn a coach more than once, even if the infractions are different.

Play 3: Team A's head coach is outside of the coaching box and is coaching his or her team. An official stops play to have the scorer record the warning in the scorebook and then notifies team A's head coach that he or she has been warned for being outside the coaching box. Later in the game team A's head coach, while within the coaching box, is demonstratively waving his or her hands at an official in disgust over a foul ruling. An official stops play and goes through the process to have a warning recorded.
Ruling 3: The official was correct to rule a warning to the coach for being outside of the coaching box. It also is acceptable to work through the same preventive officiating practices to remind the coach to remain within the coaching box as done in prior years. Repeated or constant attempts to keep a coach within a coaching box is not acceptable. It is not correct to rule a warning later to the same coach who was already warned. Once another or different rule is broken, a technical foul must be ruled. Further, a coach demonstratively waving his or her hands is a major violation of the rule and is a direct technical foul regardless of a prior warning.