Competitors must have the completed puzzle fully visible for judging. Items such as sorting trays should be removed from the puzzle as competitors approach the end of the puzzle.

Judges should position themselves in a way which allows them to see both the competition puzzle which they are currently judging as well as the time clock. Both the puzzle and clock should be in the same line-of-sight, allowing for an accurate finishing time to be recorded. (Judges should not have to turn their head to see the clock.)

The official time clock should always be visible to competitors, judges, and spectators.

NOTE: There are inherent risks when the clock is run digitally on a website or simply run off a computer. Backup timekeeping plans should be preplanned by event organizers