Illegal Lineup Warning Sign - Sports Compliance Alert #141958 (License: Personal Use)

This high-contrast visual features a solid black background with a white rectangular banner at the bottom containing the capitalized text "ILLEGAL LINEUP" in bold sans-serif font. Designed for maximum visibility, it serves as an immediate alert during live sports events when a team violates substitution or starting lineup rules. The sign is typically held by officials or displayed on digital boards to notify coaches, players, and spectators of a procedural infraction.

Used by referees or game officials during organized sports (e.g., FIBA basketball, FIFA soccer, NHL hockey) to indicate a lineup violation-such as too many players on the field/court or unauthorized substitutions-triggering penalties or stoppage of play. Matches user intent for understanding sports regulations, officiating tools, or compliance training materials.