What happened: The league will issue warnings when neck guards, visors and helmets in warmup are not properly worn. Jerseys must start each shift untucked, even if they ride up during play.

Why it matters: The move signals stricter safety and uniform enforcement for the 2025-26 preseason. A jersey-tuck penalty earlier in the preseason showed the standard will be called on the ice.

What to watch: Watch whether warnings escalate to penalties as the preseason continues.