The primary purpose of a PAVO Affiliated Board is to recruit, train, rate, and certify officials (referees, line judges, and scorers) to service officiating needs in the board’s geographical area. PAVO has developed training materials (Training Manuals, PowerPoint presentations, and online learning systems such as iREF), exams, rating and certification procedures and standards, and criteria to evaluate multiple levels of ability and experience for officials’ certification. At the local level, Affiliated Boards are authorized to award scorer certifications, and all levels of referee and line judge certifications except National Referee or National Line Judge certifications, so long as the board’s on-court evaluation committee members meet the necessary criteria (PAVO Handbook for Affiliated Board Chairs).