Referee
The referee shall have full control and authority over all officials, approve their assignments, and instruct them regarding all special features or regulations related to the competitions. He shall enforce all rules and decisions of FINA and shall decide all questions relating to the actual conduct of the meet, and event or the competition, the final settlement of which is not otherwise covered by the rules.
Heats
The best competitive times of all entrants for the preceding twelve (12) months prior to the entry deadline of the competition, shall be submitted on entry forms and listed in order of time by the Management Committee. Swimmers who do not submit official recorded times shall be considered the slowest and shall be placed at the end of the list with a no time. Placement of swimmers with identical times or of more than one swimmer without times shall be determined by draw. Swimmers shall be placed in lanes according to the procedures set forth in SW 3.1.2. below. Swimmers shall be placed in trial heats according to submitted times in the following manner.
Semi-Finals and Finals
Where no preliminary heats are necessary, lanes shall be assigned in accordance with SW 3.1.2 above. Where preliminary heats or semi-finals have been held, lanes shall be assigned as in SW 3.1.2 based, however, on times established in such heats.
In the event that swimmers from the same or different heats have equal times registered to 1/100 second for either the eighth place or sixteenth place, there shall be a swim-off to determine which swimmer shall advance to the appropriate finals. Such swim-off shall take place not less than one hour after all involved swimmers have completed their heat. Another swim-off shall take place if equal times are registered again.
FREESTYLE
Freestyle means that in an event so designated the swimmer may swim any style, except that in individual medley or medley relay events, freestyle means any style other than backstroke, breaststroke or butterfly.
Some part of the swimmer must break the surface of the water throughout the race, except it shall be permissible for the swimmer to be completely submerged during the turn and for a distance of not more than 15 metres after the start and each turn. By that point, the head must have broken the surface.
BACKSTROKE
Prior to the starting signal, the swimmers shall line up in the water facing the starting end, with both hands holding the starting grips. Standing in or on the gutter or bending the toes over the lip of the gutter is prohibited.
At the signal for starting and after turning the swimmer shall push off and swim upon his back throughout the race except when executing a turn as set forth in SW 6.4. The normal position on the back can include a roll movement of the body up to, but not including 90 degrees from horizontal. The position of the head is not relevant.
BREASTSTROKE
From the beginning of the first arm stroke after the start and after each turn, the body shall be kept on the breast. It is not permitted to roll onto the back at any time. Throughout the race the stroke cycle must be one arm stroke and one leg kick in that order.
All movements of the arms shall be simultaneous and in the same horizontal plane without alternating movement.
BUTTERFLY
From the beginning of the first arm stroke after the start and each turn, the body shall be kept on the breast. Under water kicking on the side is allowed. It is not permitted to roll onto the back at any time.
All up and down movements of the legs must be simultaneous. The legs or the feet need not be on the same level, but they shall not alternate in relation to each other. A breaststroke kicking movement is not permitted.
MEDLEY SWIMMING
In individual medley events, the swimmer covers the four swimming styles in the following order: Butterfly, Backstroke, Breaststroke and Freestyle. In medley relay events, swimmers will cover the four swimming styles in the following order: Backstroke, Breaststroke, Butterfly and Freestyle.
(BOCOG)