It's not in the NFHS Rule book, nor is it a modification to the OHSAA Football Regulations. It's a directive from the Director of Officiating and the Director of Development for Football.
The reason why officials are murky on the "rule" is because the initial instructions to the officials were murky. After much consternation, it now boils down to this....
......If both coaches agree that punts will not be executed, they will decide how the ball will be placed. It could vary game to game, week to week. (much like summer baseball.... the flavor of the day) Officials have no say whatsoever in this decision. Pesonally, I have no problem with the last part, as we don't have any say in the rules. However, I wish the directive carried a specific procedure to handle this.
It won't happen at the varsity level unless it becomes an adoption approved by the NFHS.