FAI F2C VOLUME 2 SECTION 4, 4.3.7
m) During the refuelling and the restart of the motor, and until the time when he releases the model
aircraft, the mechanic must keep the model aircraft in contact with the ground by at least one point and
with the centre line outside the flight circle. During that time the pilot must be crouching or sitting inside
the centre circle. He keeps one hand on the ground and his handle and his lines as close to the
ground as defined by the F2C panel of judges until the model aircraft starts again.