5c. Foul Detection
A USBC approved automatic foul detecting device must be used, if available. When not available or
temporarily inoperative, the following procedures shall be used to call fouls:
1. In tournament play, management shall assign a foul judge or have the official scorers call fouls.
2. In league play, the opposing team captains shall call fouls or a foul judge shall be appointed.
Failure to provide for the calling of fouls as specified shall disqualify scores bowled for USBC High
Score Award consideration.
Commonly Asked Question – Rule 5c.
5c/1 What happens if our foul lights are not available?
If not available, members of the league should be advised the captains are responsible for the
calling of fouls or someone can be designated to act as a foul judge.
5d. Apparent
A foul shall be declared and recorded if the automatic foul detecting device or foul judge fails to call a
foul that is apparent to:
1. Both captains, or one or more members of each of the opposing teams, or
2. The official scorer, or
3. A tournament official.
If there is a dispute, refer to Rule 10, Provisional Ball.