A direct comparison of Rule 15 of the 2026 Official Playing Rules of the National Football League (PDF pages 66–71) and Rules 37, 38, and 60 of the 2026–27 National Hockey League Official Rules (PDF pages 71–78 and 102) reveals two distinct regulatory architectures for balancing bench-initiated replay challenges against central-booth intervention and game-flow deterrence.
Coach Challenge Minimums, Timeout Sanctions, and Delay-of-Game Penalties
In the 2026 NFL Rulebook, Rule 15, Section 1, Article 1 grants each team a minimum of two coach challenges per game—initiated by throwing a red flag onto the field before the next legal snap or kick—and awards a third challenge if a club succeeds on at least one of its first two attempts. However, an NFL coach must possess a remaining team timeout to challenge, forfeits a timeout if the challenge is unsuccessful, and is assessed a 15-yard unsportsmanlike conduct penalty between downs if a challenge is initiated with no timeouts remaining or when all challenges have been exhausted. By contrast, Rule 38.7 of the 2026–27 NHL Official Rules does not require a team to use or possess a time-out to initiate a Coach’s Challenge across the four permissible Rule 38.2 categories (off-side play leading to a goal, missed offensive-zone stoppage event leading to a goal, goalkeeper interference, and rescinding a deflected puck-over-glass delay-of-game minor). Instead, Rule 38.8 deters speculative challenges through on-ice manpower sanctions: a first failed Coach’s Challenge results in a two-minute minor penalty for delaying the game, and any subsequent failed challenge in the same game carries a four-minute double-minor penalty.
Late-Game Booth Takeovers and Expedited Officiating Assistance
Both rulebooks shift initiation authority away from the coaching benches during decisive clock windows while defining separate channels for expedited officiating assistance. Under NFL Rule 15, Section 1, Article 2, only the Replay Official or the Senior Vice President of Officiating (or designee) may initiate a review after the two-minute warning of each half, throughout overtime, on scoring plays and Try attempts, and on turnovers, fourth-down line-to-gain rulings, kick-down possession rulings, and player disqualifications, while Sections 2 and 9 authorize expedited review and objective consultation on penalty enforcement, proper down, spot, and clock administration. In the NHL, Rules 38.3 and 38.6 require the NHL Situation Room to initiate any applicable reviewable challenge in the final minute of regulation and at any point in overtime alongside its ten Rule 37.3 goal-review mandates, whereas Rule 60.3 assigns video review of four-minute high-sticking double-minor penalties exclusively to the calling Referee and On-Ice Officials to confirm that the apparent injury was caused by the penalized player’s stick.