Boys shall use the 1.5 m ramp .
They can show a certified result of a jump of 38m on a 1.5 m ramp in which case they may opt to jump on a 1.65 m ramp .
Boys shall use the 1.5 m ramp unless they can show a certified result of a jump of 38m on a 1.5 m ramp in which case they may opt to jump on a 1.65 m ramp .