Article 12: The conduct of the players

12.1	The players shall take no action that will bring the game of chess into disrepute.
12.2	Players are not allowed to leave the ‘playing venue’ without permission from the arbiter. The playing venue is defined as the playing area, rest rooms, refreshment area, area set aside for smoking and other places as designated by the arbiter.
	The player having the move is not allowed to leave the playing area without permission of the arbiter.
12.3	a. During play the players are forbidden to make use of any notes, sources of information or advice, or analyse on another chessboard 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. c. Smoking is permitted only in the section of the venue designated by the arbiter
12.4	The scoresheet shall be used only for recording the moves, the times of the clocks, the offers of a draw, and matters relating to a claim and other relevant data.
12.5	Players who have finished their games shall be considered to be spectators.
12.6	It is forbidden to distract or annoy the opponent in any manner whatsoever. This includes unreasonable claims, unreasonable offers of a draw or the introduction of a source of noise into the playing area.
12.7	Infraction of any part of Articles 12.1 to 12.6 shall lead to penalties in accordance with Article 13.4.
12.8	Persistent refusal by a player to comply with the Laws of Chess shall be penalised by loss of the game. The arbiter shall decide the score of the opponent.
12.9	If both players are found guilty according to Article 12.8, the game shall be declared lost by both players.
12.10	In the case of Article 10.2.d or Appendix D a player may not appeal against the decision of the arbiter. Otherwise a player may appeal against any decision of the arbiter, unless the rules of the competition specify otherwise.

Note: This is an excerpt from the FIDE Handbook. For actual handbook click here