What must the umpire-in-chief verify from each head coach before the game starts?

The umpire-in-chief is responsible for ensuring that the game is played under fair and safe conditions, which includes verifying that all participants are using legal and properly equipped gear. This is crucial because players must wear gear that meets safety standards set by the governing body of the game, ensuring their protection while they play. By confirming that the gear is both legal and properly equipped, the umpire helps to prevent injuries and maintain the integrity of the game. Additionally, using appropriate gear supports the enforcement of rules that promote fair play.

Options that deal with uniforms, understanding game rules, or the condition of the game ball, while important, do not directly relate to the primary objective of player safety and compliance with game regulations concerning equipment.