For what it's worth this is Rule #9 from the FLW 2004 Rulebook:

"9. Boat and horsepower regulation

All boats must be a minimum of 17 feet in length and have a rear deck. All
boats must be equipped with wheel steering; no other steering device will be
permitted. No barges or similar cumbersome crafts will be permitted. Each boat
must have all required U.S. Coast Guard safety equipment. Boats must contain a
properly aerated livewell space to maintain alive a limit catch of bass by both
contestants.
Maximum horsepower for all outboards used in tournament competition will be 250
HP, not to exceed the horsepower limitations as set by the U.S. Coast Guard.
Each boat must have a U.S. Coast Guard horsepower rating plate attached to the
boat by the manufacturer. The horsepower of the outboard engine must not exceed
the rating specified on this rating plate or the 250 horsepower maximum set by
FLW Outdoors. By signing the entry form, each pro agrees to submit their boat
and/or motor to an inspection by factory trained personnel. Falsifying
information on entry forms or altering the horsepower numbers on the motor or
rating plate will be cause for disqualification from the tournament and may
result in ineligibility to compete in future FLW Outdoors events. Fuel may be
carried only in factory installed (built-in) fuel tanks. Any additional fuel
used during the tournament day must be purchased from a retail facility open to
the public"
-Jim Jr.
www.teamhornerfishing.com