Can the dates of tournaments move?

Dates for 1.000 and 500 points tournaments cannot change anymore after they
have been officially announced.

Dates for 250 points tournaments can only change at least 3 months before the
tournament. After this deadline, the dates cannot change anymore.

If a date is changed after the deadline or after the official announcement, the
organiser must reimburse the costs to players that already had them, according to a mutual