lead mirror the trail's made three signal?

[JugglingReferee]

Originally Posted by eg-italy

The L should raise the arm only when sure that it's a 3 point attempt, not before.

In Fiba the mechanics is just the one mentioned by mcdanrd.

You're right, the L should only raise his arm on the attempt. But we make mistakes and Murphy will pop his head up now and again.

FIBA's mechanics, I believe, don't consider that newbies are officiating their events. There are many leagues around the world where first or second year officials are working FIBA rules, and make the mistake of the premature signal. With FIBA's L "drop" mechanic, there will be a higher number of mistakes than with Fed's "no drop" mechanic.