Who is responsible for announcing changes to time adjustments during a tournament?

The Head Judge is the individual responsible for announcing changes to time adjustments during a tournament. This role is crucial as the Head Judge oversees the tournament and ensures that all players and judges are informed about important procedural changes. Such announcements can include adjustments for round time limits, sideboard periods, or breaks between rounds, which are essential for maintaining the tournament's flow and fairness.

The Head Judge's authority comes from their comprehensive understanding of the tournament rules and structure, allowing them to communicate effectively with both the players and the judging staff. They are tasked with creating a fair playing environment and have the final say in matters related to tournament procedures. This responsibility cannot be delegated to random volunteers or any judge, as the Head Judge is specifically trained and designated for this role, ensuring consistency and clarity in tournament operations.