Core: Officiate at sporting events, games, or competitions, to maintain standards of play and to ensure that game rules are observed.

Core: Inspect game sites for compliance with regulations or safety requirements.

Core: Resolve claims of rule infractions or complaints by participants and assess any necessary penalties, according to regulations.

Core: Signal participants or other officials to make them aware of infractions or to otherwise regulate play or competition.

Core: Teach and explain the rules and regulations governing a specific sport.

Core: Inspect sporting equipment or examine participants to ensure compliance with event and safety regulations.

Core: Report to regulating organizations regarding sporting activities, complaints made, and actions taken or needed, such as fines or other disciplinary actions.

Core: Confer with other sporting officials, coaches, players, and facility managers to provide information, coordinate activities, and discuss problems.

Supplemental: Judge performances in sporting competitions to award points, impose scoring penalties, and determine results.

Supplemental: Verify scoring calculations before competition winners are announced.