I. Athletes are grouped in the following categories: 5th Grade Girls, 5th Grade Boys, 4th Grade Girls, 4th Grade Boys
II. The 400-meter race is run in separate heats of 8 - 16 runners.
III. Runners will start in assigned lanes, at the 200 m exchange zone lines. Runners will be able to cut in to lane 1 at the end of the first turn.
IV. No final race; the top five times from all heats will place.