Michael Farthing wrote:Michael,
Firstly, there is a slight hint in the title of what you quote that would limit the authority of the document. it is the word 'Recommendation'
Secondly, the quoted law does not make mention of a phone ringing (it concerns itself with a phone being in the playing venue) and it does not say that the game must be lost. Indeed, it specifically says that a lesser penalty may be imposed.
Independently, Roger has indentified Laws 12.8 & 12.9.
The consensus of Arbiters and regular congress players, ie established common practice, is that a sound from a mobile phone/electronic device loses the game. This situation is adequately covered by the Laws of Chess.