Competitors must pay the entrance fee to the museum, but may participate in the competition at no extra charge. See competition website for registration.
If you reach the time limit during your solve, the judge will stop you and your result will be DNF (see Regulation A1a4).
The format describes how to determine the ranking of competitors based on their results. The list of allowed formats per event is described in Regulation 9b. See Regulation 9f for a description of each format.