Disconnect without removing?

At 03:12 19 February 2008, Ak wrote:
I have a turn and bank indicator installed in my glider.
I would like
to fly in a competition this year and I read somewhere
that this kind
of instrument is not allowed to be used during a competition
flight.

The question is; do I have to remove the instrument
all together or
can the competition director seal the switch in off
position or cover
the instrument and seal it? I don't like to remove
the instrument
since it can be a safety device while wave flying in
anything less
then perfect weather.

Please note I am not asking if I should ever use this
device that is
not the question. The question is simply interpretation
of competition
rules and what does happen is a situation like this?

Thank you in advance...