Which USAV Outdoor Volleyball Rules regulate the action of receiving a serve overhand with fingers? This is a contentious topic where I play.
I found a rule that allows double contact even when overhand with fingers on a hard-driven ball. This raises related questions: Is a fast serve considered to be a hard-driven ball? What is meant by 'defensive' below? If the serve is soft/slow, then is overhand contact of a served ball with fingers legal if the contact is clean? Is FIVB the same as USAV for this?
USAV Outdoor Rules as of June 2019: https://ncva.com/downloads/Referee%20Rule%20Book%20-%20Outdoor.pdf
22.214.171.124 Extended Contacts: In defensive action of a hard-driven ball, the ball contact can be extended momentarily even if an overhand finger action is used. USAV 126.96.36.199: Plays involving finger action require special attention. If the play is defensive and reactive in nature, as in the case of a hard-driven ball, momentarily held or double-contacted balls are not considered faults...If the player decides/intends to use finger setting action to contact an off-speed attack, the contact must be “clean.”