Revised May 31, 2015
(Main update: Rule 7, because FIDE no longer requires a forfeit penalty for a ringing cellphone)

1. Players may not use, while playing, cellphones or other electronic devices capable of chess analysis or communication, without permission of a Director. See rule 10 for penalties.

2. Devices used to play music, which cannot communicate or operate software, will generally be allowed if the opponent does not object, however see rule 4, special events. The use of a computer or phone to play music is prohibited, even if the computer or phone is disabled so that it can do nothing but play music.

3. During play, electronic devices must be stored out of sight in a pocket, bag or case. etc. and turned off (no vibrate, silent or sleep mode without permission of a director). A player with a visible electronic device during play will be penalized (see rule 10). 

4. Special events: At the World Open, North American Open, Chicago Open and Philadelphia Open, the following additional rules are in effect:
     A) Devices used to play music are not allowed if either player has an 80% or higher score in round 3 or after, even if the opponent does not object.
     B) A table will usually be provided near the bathroom for players to temporarily check devices. If such a table is provided, players may not possess devices inside the bathroom. See rule 10 for penalties. Players whose games have finished and spectators are also not allowed to possess devices in bathrooms. Cellphone detecting wands will be used to spot check players who have exited bathrooms.
    C) Players may not leave the tournament area, or go to a different floor of the hotel, during play without Director's permission. The tournament area consists of the tournament room(s), skittles room(s), vendor room, lecture room, and adjacent bathrooms or foyers.

5. A player who wishes to make a call during play should see a director and request permission to call.

6. A player who anticipates possibly receiving an emergency call should notify a director at least an hour in advance, and will provided with an alternate procedure.

7. If a player’s cellphone rings in the tournament room while games are in progress, there will be a penalty (see rule 10). However, the player does not automatically forfeit, even if the event is FIDE rated, as FIDE rules no longer require this.  If an offending player’s game is over when his or her cellphone rings, the penalty shall apply to the following round.

8. In a FIDE rated tournament, players should not possess electronic devices on their person during play, but may keep them in a bag or case in the tournament room.

9. A player who simultaneously violates more than one of the rules 1, 3, and 7 will generally obtain only one penalty.

10. The penalty for violating rules 1, 3 or 7 is one of the following:
       A. The player is forfeited.
       B. The player loses 20 minutes or 75% of remaining time, whichever is less.
       C. The player loses 10 minutes or 50% of remaining time, whichever is less.
       D. If no more than 5 moves have been played, the offending player may receive a warning rather than a penalty.
       The director will determine the penalty, taking into consideration the details of the offense, the scores of the players, and the size of the prize fund. If there is evidence of cheating, the player will be forfeited regardless of score or prize fund.
11. Players must submit to a search for electronic devices if requested by a Director. Refusal to cooperate with a search request warrants forfeiture of game and ejection from the tournament, with no refund.

12. Electronic scoresheets are permitted if approved by USCF, but they must not be powered by devices capable of communication or operating chessplaying programs.