Extract from the FIDE Laws of Chess, applicable from 1 January 2023
Greyed out sections to do not apply.
Appendix B. Blitz
B.1 A ‘blitz’ game is one where all the moves must be completed in a fixed time of 10 minutes or less for each player; or the allotted time plus 60 times any increment is 10 minutes or less for each player.
B.3 Otherwise, play shall be governed by the Rapid chess Laws as in Article A.2, A.3 and A.5.
B.4 The regulations of an event shall specify whether Article B.2 or Article B.3 shall apply for the entire event.
ECA Blitz Championship, 2 September 2023, Appendix B Blitz, Article B3 shall apply for the entire event and consequently, so do Appendix A Rapid Chess, Articles A2, A3 and A5.
Appendix A. Rapid Chess
A.2 Players do not need to record the moves, but do not lose their rights to claims normally based on a scoresheet. The player can, at any time, ask the arbiter to provide him/her with a scoresheet, in order to write the moves.
A.3 The penalties mentioned in Articles 7 and 9 of the Competitive Rules of Play shall be one minute instead of two minutes.
Article 7 first Illegal move the opponent shall be awarded one extra minute (second illegal move by the same player in the same game loses);
Article 9 incorrect Draw claim for three times repetition, or 50 move rule, the opponent shall be awarded one extra minute.
A.5 Otherwise the following apply:
A.5.1 From the initial position, once 10 moves have been completed by each player,
A.5.1.1 No change can be made to the clock setting, unless the schedule of the event would be adversely affected.
A.5.1.2 No claim can be made regarding incorrect set-up or orientation of the chessboard. In case of incorrect king placement, castling is not allowed. In case of incorrect rook placement, castling with this rook is not allowed.
A.5.2 If the arbiter observes an action taken under Article 7.5.1, 7.5.2, 7.5.3 or 7.5.4, he/she shall act according to Article 7.5.5, provided the opponent has not made his/her next move. If the arbiter does not intervene, the opponent is entitled to claim, provided the opponent has not made his/her next move. If the opponent does not claim and the arbiter does not intervene, the illegal move shall stand and the game shall continue. Once the opponent has made his/her next move, an illegal move cannot be corrected unless this is agreed by the players without intervention of the arbiter.
A.5.3 To claim a win on time, the claimant may pause the chessclock and notify the arbiter. However, the game is drawn if the position is such that the claimant cannot checkmate the player’s king by any possible series of legal moves.
A.5.4 If the arbiter observes both kings are in check, or a pawn stands on the rank furthest from its starting position, he/she shall wait until the next move is completed. Then, if an illegal position is still on the board, he/she shall declare the game drawn.
A.5.5 The arbiter shall also call a flag fall, if he/she observes it.