NFHS 6-2-4-d(1)
If the pitcher, with a runner on base, stops or hesitates in his delivery because the batter steps out of the box with (a)one foot or (b)both feet or ©holds up his hand to request "time," it shall not be a balk. in (a) and ©,there is no penalty on either the batter or the pitcher. The umpire shall call "time" and begin play anew. In (b)a strike shall be called on the batter for violation of 7-3-1 (leaving the box during an at-bat.) in (a), (b)and©, if the pitcher legally delivers the ball, it shall be called a strike and the ball remains live. Thus, two strikes are called on the batter in (b. If the umpire judges the batter's actions to deliberately create a balk, he will penalize according to 3-3-1 (o).
Isn't umpiring easy? Lol.