Whistle on a throw-in

[hawk65]

I was informed you don't toot your whistle when administering every throw-in. I thought it just seemed like a good idea to toot any time when administering a throw-in anywhere on the court to alert everybody play is resuming, especially after a time-out, a discussion at the table, a moment has been taken to clarify something with the coach(es), the ball had to be chased behind the bleachers, etc. So what are the mechanics and why? Do you blow your whistle prior to handing the ball to A for the throw-in under A's basket only? Below the free-throw line extended? In the A's frontcourt only? What criteria do you use?