1K4. Racing numbers.
(a) Racing numbers are provided by the organizer, who may
require a deposit that shall be refunded on return of the
numbers in good order. The figures should be black, and be
12 to 14 cm high on a light colored background 20 cm or less
in height and 20 cm wide. The figures shall not be
handwritten, but printed in block letters using waterproof ink.
Numbers shall be constructed from materials sufficiently
durable to last the race without tearing or disintegrating,
even in adverse weather. The name of the race or race
sponsor may appear on a competitor's number. [Promoters
who fail to provide numbers meeting the above requirements
to all riders shall be fined as specified in the Schedule of
(b) Riders shall place their numbers as prescribed by the
officials and in such a way that they are visible when the rider
is in a racing position. Hip numbers shall be attached securely
at least at the four corners and no accessory may cover them.
If shoulder or frame numbers are provided, they too shall be
placed as prescribed. Numbers may not be folded, trimmed,
crumpled, or otherwise defaced
. [Replacement of the
numbers at riders' expense if noted before the start,
otherwise warning or relegation.]