Overview
- The Canadian Premier League, which confirmed the trial Tuesday, will use the new interpretation from Saturday’s season opener as the first pro test of the rule.
- Under the 'daylight' standard, an attacker is onside if any scoring body part is level with or behind the second‑last defender, and offside only when a clear gap is visible.
- FIFA will run the research and evaluation and, with Canada Soccer, will prepare referees, after IFAB approved the professional pilot in February.
- The league will also launch Football Video Support that uses broadcast replays, gives each team two coach‑initiated review requests per match, and checks every goal for clear and obvious offences.
- FIFA’s Arsène Wenger says the change aims to restore attacking advantage and speed up play, while European critics warn it tilts the field toward strikers and could force deeper defensive lines.