FIFA match officials, including Slovene referee Slavko Vincic, shown here issuing a yellow card in March, will have new rules to apply during the World Cup. Getty Images LOS ANGELES — The referees chosen to work the 2026 World Cup have some new tools to speed up the games and ensure that any match-altering officiating mistakes are corrected. Among the many changes that fans will see during the World Cup: A substituted player must exit the field within 10 seconds.