NFHS - Whistle before handing ball to thrower?

[HawkeyeCubP]

NFHS - Lead Official - Do you give a whistle before handing the ball to the thrower for an endline throw-in (team throwing in is going to the near basket) when there has not been a delay? Possibly just when it's loud?

From the Officials' Manual - Basic Procedures and Mechanics - Two Officials - Throw-In - 220 - The administering official shall sound the whistle only following a charged time-out, an intermission or an unusual delay.

So I've answered my question by the book, per se, but I'm curious for the forum's take on this, from those that work college and high school, as well as only high school, or if anything has been released by the NFHS since this book was published that I'm unaware of regarding this.

Thank you in advance for the responses.