Correct clock handling
Every indication given by the clocks is considered to be conclusive in the absence of any evident defect. A chess clock with an evident defect shall be replaced. The arbiter shall replace the clock and use his best judgement when determining the times to be shown on the replacement chess clock.

If during a game it is found that the setting of either or both clocks was incorrect, either player or the arbiter shall stop the clocks immediately. The arbiter shall install the correct setting and adjust the times and move counter. He shall use his best judgement when determining the correct settings. (Article 6.10)

Draw agreement
The rules of a competition may specify that players cannot agree to a draw, whether in less than a specified number of moves or at all, without the consent of the arbiter. If the rules of a competition allow a draw agreement the following apply:

(1) A player wishing to offer a draw shall do so after having made a move on the chessboard and before stopping his clock and starting the opponent’s clock. An offer at any other time during play is still valid, but Article 12.6 must be considered. No conditions can be attached to the offer. In both cases the offer cannot be withdrawn and remains valid until the opponent accepts it, rejects it orally, rejects it by touching a piece with the intention of moving or capturing it, or the game is concluded in some other way.

(2) The offer of a draw shall be noted by each player on his scoresheet with a symbol. (See Appendix C13)

(3) A claim of a draw under Article 9.2, 9.3 or 10.2 shall be considered to be an offer of a draw. (Article 9.1)

Claiming a draw
The game is drawn, upon a correct claim by the player having the move, if :
a. He writes his move on his score-sheet, and declares to the arbiter his intention to make this move which will result in the last 50 moves having been made by each player without the movement of any pawn and without any capture, or

b. the last 50 consecutive moves have been made by each player without the movement of any pawn and without any capture. If the player touches a piece as in Article 4.3 without having claimed the draw, he loses the right to claim, as in Article 9.2 or 9.3, on that move. If a player claims a draw as in Article 9.2 or 9.3, he may stop both clocks. (See Article 6.12.b) He is not allowed to withdraw his claim.
a. If the claim is found to be correct the game is immediately drawn.
b. If the claim is found to be incorrect, the arbiter shall add three minutes to the opponent’s thinking time. Then the game shall continue. If the claim was based on an intended move, this move must be made as according to Article 4. (Articles 9.3, 9.4, and 9.5)

Claiming a draw in Quickplay Finish
If the player having the move has less than two minutes left on his clock, he may claim a draw before his flag falls. He shall summon the arbiter and may stop the clocks. (Article 10.2)

Electronic devices in the playing venue
Without the permission of the arbiter a player is forbidden to have a mobile phone or other electronic means of communication in the playing venue, unless they are completely switched off. If any such device produces a sound, the player shall lose the game. The opponent shall win. However, if the opponent cannot win the game by any series of legal moves, his score shall be a draw. (Article 12.3)

Unless authorised by the arbiter, it is forbidden for anybody to use a mobile phone or any kind of communication device in the playing venue and any contiguous area designated by the arbiter.(Article 13.7)

Claiming a draw and win in Rapid Play
1. The flag is considered to have fallen when a player has made a valid claim to that effect. The arbiter shall refrain from signalling a flag fall, but he may do so if both flags have fallen.

2. To claim a win on time, the claimant must stop both clocks and notify the arbiter. For the claim to be successful the claimant’s flag must remain up and his opponent’s flag down after the clocks have been stopped.

3 If both flags have fallen as described in (1) and (2), the arbiter shall declare the game drawn. (Article A4.d.3)

Illegal move in Blitz game
An illegal move is completed once the opponent’s clock has been started. The opponent is entitled to claim a win before he has made his own move. However, if the opponent cannot checkmate the player’s king by any possible series of legal moves, then the claimant is entitled to claim a draw before he has made his own move. Once the opponent has made his own move, an illegal move cannot be corrected unless mutually agreed without intervention of an arbiter. (Article B3)

The rules of Chess 960 are included (Article F)
There have been some other slight changes which mainly touch upon the more precise definition of certain factors like "the diagonal”, "pawn exchange”, "legal move”, "adjourned game”, "castling”, "flag”, "drawn game”, "the player’s appeal”, "role of arbiters in Rapid Play” and "score-sheet recording”.

Reference:
-- FIDE