It is the USAV mandate to nurture all variations of the game (indoor, grass, sand, six-person, doubles, coed, etc.) at all skill and age levels. USAV responsibilities include supporting a year-long training schedule for the Olympic Teams; USA Youth Volleyball (ages 7-12); the Junior Olympic Volleyball program (ages 12-18); U.S. Open Championships by age groups; the USA Coaching Accreditation Program (CAP); establishing rules of play in the U.S. and certifying referees and scorekeepers