[FMadera]

Well, the big thing you'll notice is the signalling sequence; it goes "winning team, fault" instead of "fault, winning team." There is also no "point" signal; the R1, or 1st referee (no umpire in club, it's R2 or 2nd referee) uses the "side out" signal to signify which team has won the rally, then why.

Example: S4 hits a ball down onto R's court. Signal: "Sideout" S, then ball down.

Not sure if your state uses the libero yet, but make sure you're comfortable with all the libero do's and don'ts. Also understand that a ball that rolls along the body is much more likely to be considered "multple contacts" in USAV than it would be in NFHS, so make sure unless a ball is, in your opinion, caught or thrown, you are not making the "lift" signal. Also make sure you're distinguishing illegal contacts as doubles if that's what they are; don't use the "lift" signal on a 2nd ball that you would have let go on 1st; use the double contact signal.

There is also no provision in USAV for the "safe set" (set by back row attacker with ball totally above net height that is legally blocked is a back row attack in USAV). Contact below the waist is also completely legal, and you will see players intentionally kick a ball to prevent it from hitting the floor.

The back row block is totally different (and IMHO, better) in USAV, as it is *not* a fault for a back row player to attempt to block, only to complete one either by herself or as part of a collective block.

With the new FIVB modified rules, multiple subs are now handled differently. They should line up behind each other, then be administered one at a time.

That's all I can think of for now...the rest is pretty similar. Good luck!