What is required before a game can begin according to the umpire-in-chief?

Before a game can begin, it is essential for both coaches to verify player equipment. This requirement is in place to ensure that all players are using equipment that meets safety standards and rules set forth by the governing body. By having both coaches involved in the verification process, it promotes accountability and helps prevent any discrepancies regarding the legality of the players' gear. This step is critical in maintaining fairness and safety during the game, as improper or unapproved equipment can lead to injuries or unfair advantages.

The other options do not encompass the comprehensive requirement necessary for game preparation. For instance, having just the home team coach's verification does not ensure all players are adequately equipped. The umpire's personal inspection, while important, typically follows the coaches' confirmations. Lastly, while proper warm-up routines are beneficial for player readiness, they are not a prerequisite that must be completed before the game officially starts.