Let’s jump in with the rules, via the NFL’s Football Operations site: If the score is still tied at the end of an overtime period — or if the second team’s initial possession has not ended — the teams will play another overtime period. Play will continue regardless of how many overtime periods are needed for a winner to be determined.

NFL fans witnessed something never seen before. A lead change on the final play of the Super Bowl. The reason? Super Bowl LVIII became the first playoff game under the league’s new overtime rules for the postseason,

The NFL told teams this week that its sportsmanship-related rules will be “strictly enforced” during the postseason. That message was delivered in a Wednesday memo from Perry Fewell, the league’s senior vice president of officiating communications and administration, to general managers and head coaches.

The controversial overtime matchup between the Bills and Chiefs two seasons ago was a key motivator for the new postseason overtime rules.