In the UK Flarm has to be set to stealth mode for use in
competitions. This was introduced this year. Organisers may
make spot checks for compliance, but I'm not aware of any checks
being made. It didn't seem to cause any issues, apart from the
minor hassle of making the file change on the sd card.

At 11:57 29 October 2010, Paul Remde wrote:

I hope that the U.S. Contest Rules Committee finds through this
thread
that
forcing the use of Stealth or Competition modes is not being done
anywhere

in the world. I don't know whether or not that is true - but I
suspect it

is from what I have heard from my customers around the world.