IWSF 1997 Tournament Rules Addendum

This is the official addendum to the 1995 Rules as certified by the IWSF Tournament Council on September 6, 1996. The addendum is a compendium of the 1996 Addendum and the further rules modifications made by the IWSF Tournament Council at its annual meeting. Those rules added to the 1996 addendum are italicized.

Robert K. Corson, Chairman

Rule 2.02

The first eight (8) team skiers based on the results of the preliminary round, shall be qualified to ski in the final round of that event. If there is a tie for eighth (8th) place or a tie for a higher place that would result in more that eight team skiers being in the finals (e.g. 4 skiers tied at 6th), there will be a run-off between the tied contestants so that only eight team skiers will be in the finals.

In the case where non-team skiers are entered in the tournament on an individual basis, and place in the first 8 in the preliminary round, they will participate in the finals in addition to the eight (8) team skiers.

2.03: Schedule of Events (eliminate reference to familiarization)

Not later than two months before the start of the tournament, the Tournament Chairman shall send to each affiliated Federation, by air mail, a schedule showing the days on which the tournament events will be held. The schedule of events for both the preliminary and final rounds shall be drawn up by the Chief Judge, the Chairman of the Tournament Council and the Tournament Chairman and posted prior to the start of the first event. This list shall include starting time for each day. A schedule of starting times for individual events, if shown, shall be for the guidance of the contestants only, and any deviation shall not constitute a change. It is recommended that jumping be scheduled as the last event in both the preliminary and final rounds.

2.05: World Championships Entry and Administration

Change all references to familiarization or official familiarization to "start of the first event"

If the official entry forms are not received prior to the 24 hours before the start of the first event, the Federation's skier's places in the draw shall be determined by the Chief Judge without reference to their qualifying scores.

2.06: Official Familiarization (Delete this rule)

Rule 2.08

Once homologations starts, use of the site is under the authority of the Chief Judge until the completion of the tournament.


b) Ranked on the IWSF World Rankings List in the top 8 in any event or ranked in the top 3 in overall

To qualify as a World Record Holder, the skier must have performed the record at least 45 days before the first day of the World Championships and have his performance ratified by the Tournament Council and the President of the IWSF 15 days before the first day of the World Tournament.

6.01: Chief Judge - Appointed Officials.

At least six (6) months prior to the start of official start of the World Tournament, the President of the IWSF shall appoint the Chief Judge for the World Tournament from among the Chief Judges proposed by each Region Tournament Council.

6.02: Choosing Appointed Judges

A total of 10 judges shall be selected.

Each region will nominate a person for the 10th judge to be selected by the Chairman.

6.03: Event Judges

For the World Championships, the Event Judges must be chosen by the Chief Judge from among the Appointed Judges, preferably as follows:

For Slalom - no more than two judges from any one Region.

For Tricks - the best panel appropriate for the level of trick performances

For Jumping - one Judge per Region.

At other tournaments, the selection to the event judges shall be governed by Region administrative practice.

"6.04 The scoring sheets of each judge for every skier shall be made available for a period of 30 minutes for inspection by the team captain as soon as the provisional results are posted. Under the team captain's responsibility, a skier may view his own scoring sheets.

If a skier's score sheet is changed based upon this review, the changed sheet will be available for inspection for a period of 15 minutes after the revised results are posted assuming that this would not be less that the initial 30 minute limit. Each time a sheet is changed, it will be available for another 15 minutes for review."

7.06: Safety Boats

Two safety boats shall be used during all events.

7.08: On Site Medical Facilities

The Safety Director will appoint a Tournament Medical Officer who will undertake to provide the following services:

1) A suitably qualified medical officer will be in attendance during all tournament events.

8.01: Team Representative

Each Federation shall select a team representative whose name shall be given to the Chief Judge before the start of the first event. The team representative shall represent all skiers from his federation. An alternate team representative may also be named.

10.03 c) Devices affixed to the ski intended to control or adjust the skiing characteristics of the ski are allowed as long as they are fixed in that they do not move or change during actual skiing.

10.04 a)

Weight per meter: 23.0 grams/meter maximum

Breaking load, minimum = 590 kg.

Elongation at 115kg tensile load: 2.4% +/- 0.8%.

The guage length shall be set at 5.5 kg tensile load

Rule 10.07 Speed Control

Speed control will be required for the World Championships. The specific make and model of speed control will be announced when the boats are announced for the World Championships (see 10.01 e).

Further, speed control will be required for all Ranking list and Record tournaments starting Jan.1, 1998 and for the 1997 World Cup tournaments.

Some of the important points are as follows:

(a)If speed control breaks then go to manual. If a replacement unit or boat is not available, or the unit cannot be quickly repaired, then the tournament shall be continued with manual driving with no other effect.

(b)If the unit allows, the speed may be micro adjusted a set number of specific speed steps to compensate for wind or current conditions on a pass by pass basis under the control and/or observation of the boat judge.

(c)The principle job of the speed control is to provide independence of the manual operator and to give in tolerance, constant speeds, as close as possible to actual times.

(d)The Boat Judge and the Driver shall jointly agree on the setting of the speed control and the allowed adjustments for wind conditions, etc, with the goal of having the machine produce actual times for each pass.

11.02: Tolerances (see also Rule 1.11)


In the jumping event, it is the responsibility of the driver to drive the boat at the constant speed (as selected by the skier (see Rule 13.04)) throughout the entire course. The driver may not intentionally increase or decrease the speed or intentionally allow the speed to increase or decrease. He must maintain a constant speed.If, in the opinion of the boat judge, the speed before or after the timing course was a disadvantage to the skier, he will be given the option of a reride.

Rule 12.01

In 12.01 put reference to video buoys 3rd sentence

No buoys or markers other than those indicated by Diagrams 1,2,3,4 and 5 and video jump measurement buoys are permitted within the competition area except to mark safety hazards, landing or starting areas, or turning buoys.

The entrance of the courses for each event are defined as follows:

Slalom: The start gates of the slalom course on the first pass

Jumping: The 180m buoy on each pass

Tricks: The first trick buoy on each pass

13.01: General Jump Event Conditions

The skier shall be entitled to two jumps or passes or falls from the time he

starts in the preliminaries and three jumps or passes or falls from the time

he starts in the finals.

a) Women jumpers will have the option of choosing either a height of 1.65 m. or 1.50m (see Rule 13.02d).

b) Men jumpers will have the option of choosing either a height of 1.65 m. or 1.80m (see Rule 13.02d).

Only the length of the jump will be considered no matter what ramp height is chosen by the skier.

A skier may not change his chosen height of the ramp for the final round if he qualifies.

Skiers jumping at each height will be drawn together and will ski before those jumping at the higher height setting in both the elimination and final rounds.

Rule 13.02

d) Ratio of ramp height at take off edge to ramp length out of water:

-0.275 +/- 0.003 or 0.255 +/- 0.003 for Men, at the skier's option

-0.255 +/- 0.003 0r -0.235 +/- 0.003 for Women, at the skier's option

Ratios are to be computed on both sides of the ramp, and the ramp height at the take off edge at the two corners may differ by no more than 2.5 cm. (See

Ramp Setting Chart).

e) Jumpers must notify the Chairman of the IWSF Tournament Council, the Chairman of the Region Tournament Council, and the organizers, on the official entry form, what their choice will be for the ratio mentioned in d) above.

13.04: Boat Timing (Reference 11.02)

1st segment 2nd segment

Speed fast actual slow fast actual slow

57 5.11 5.18 5.25 2.52 2.59 2.66

54 5.39 5.47 5.55 2.66 2.73 2.81

51 5.70 5.79 5.88 2.81 2.89 2.98

48 6.05 6.15 6.25 2.98 3.08 3.17

45 6.45 6.56 6.68 3.17 3.28 3.39

42 6.90 7.03 7.17 3.39 3.51 3.64

39 7.42 7.57 7.73 3.64 3.78 3.94

*******************stopped here 4/9/97****************** 13.10 add

"If the official resolution of a particular set of sightings, according to the above rules, produces an official wide triangle, and that set of sightings included a spread in excess of the 0.6 meter test limit AT ONLY ONE of the meter stations, which yielded the smaller triangle size by using the average rather than the shorter reading alone, then the longer reading from that station may be tried alone, and used as official, if it eliminates the wide triangle."

Rule 13.11 (add)

Alternatively, if video jump distance measurement is used, the distance shall be measured to the skier's point of impact in the water closest to the ramp (first point of impact) and then an adjustment offset of 2.1m shall be added.

For the video system, there shall be two designated officials (from different countries at international tournaments) operating the system who shall jointly agree on the impact point. The calculated distance shall not be displayed until the impact point is decided upon.

If video jump measurement is used, video backup methods (video taping) may be used or a standard meter system may be used.

Rule 13.15 paragraph 2

In addition to the offical timer, at least one other timing device shall be operated from the boat unless not feasible in which case it will be from the shore. In the event that the official timer fails to get an accurate time for some reason, the backup timer shall govern.

Rule 13.15 Add between paragraphs 4 and 5

If the second segment is fast on a successful jump but the distance recorded is less than previous or following jumps in the round by the skier, then a reride will not be awarded.

Rule 13.15 (last paragraph)

If a rerun is given because of a faulty boat path or an error in speed, it must be taken immediately, and the Boat Judge must hold up an appropriate flag during the return pass to indicate that a reride will be taken on the jump that has just been completed. If there are more than two (2) rerides, the skier shall have the option of asking for a five-minute rest before continuing.

Jump Timing Reride Chart

seg1 seg2 action
OK OK none
OK F mandatory reride only if distance is best distance in skiers turn
OK S optional reride (protected score)
S OK optional reride (protected score)
S F if best distance, mandatory reride
S S optional reride (protected score)
F OK mandatory reride
F S mandatory reride
F F mandatory reride

14.06: Buoys

d) Slalom skier and gate buoys shall be 22 to 28 cm. in diameter. 23 cm. is recommended. These buoys shall also be generally spherical above the waterline.

g) Buoys shall be fastened so that they have 11-17 cm of height out of the water (11.5 cm recommended)

Rule 14.07 paragraph 3

The skier may elect to waive all passes below a selected rope length (or speed should the Appointed Judges lower the minimum starting speed). In such cases the skier may notify the dock official of his selected rope length (or speed) any time before he starts his run. A skier who fails to select his starting speed at the specified time, will start at the maximum starting rope length and minimum speed for the event. Further optional selection of slalom passes is also allowed. If a skier misses in a pass that follows an optionally skipped pass, he/she shall be scored as if the buoys were scored in the pass following the last completed pass.

Rule 14.14 paragraph 4

Where the applicable speed is slower than allowable on any pass, a rerun shall be mandatory. If either time is too slow, a reride is mandatory. If the pass was not a perfect pass, the skier may not improve his score over that obtained on the slow pass, unless the speed is so slow that it is equal to or below the fast tolerance of the next slower pass. One exception to this is, if the skier scores more than 2 1/2 and the 1st segment is fast and the 2nd segment is slow, or the 1st segment is slow and the 2nd segment is fast, a reride is mandatory but the skier may improve his score. If the pass was a perfect pass (score is 6, skier to continue), the skier may choose to proceed to the next pass instead of repeating the pass. If the skier then makes a perfect pass, he receives credit for both passes. If the pass is missed, he will receive credit for the buoys made as if it were the lower, skipped pass.

Rule 14.14 paragraph 11

In adition to the offical timer, at least one other timing device shall be operated from the boat unless not feasible in which case it will be from the shore. In the event that the official timer fails to get an accurate time for some reason, the backup timer shall govern.

Modified Table

Boat Times and Reride Situations

1st 2nd 2 1/2 or less 3-6 w/miss 6 no miss
OK S - MR, 2 1/2+ MR, 2 1/2+, Go Up
F S OR MR* or 2 1/2+ MR, 2 1/2+, Go Up
S F MR MR* MR, Go Up

OK=Good Time;



Go Up=Skier Option to Continue

-=Score Stands As Is

OR=Optional Reride, score not to decrease

MR=Mandatory Reride, refer to paragraph 4

MR*=Mandatory Reride, score may improve

2 1/2+=Protected score of 2 1/2

Rule 14.14 paragraph 8

If ther are more than two (2) rerides, the skier shall have the option of requesting a five-minute rest before continuing.

***************************got to here 5/14/97*********************** 14.15: Damaged Equipment

If a skier has damaged his equipment during a run that leads to a reride, he must be back on his skis within 3 minutes from the time the reride has been granted or he is not allowed to continue in the round. If the skier is not allowed to continue, in the case of a mandatory reride, the pass that brought about the reride is scored as 0 unless the score was 2 1/2 or greater and the first segment was OK or Fast in which case the skier is scored with 2 1/2.

If the skier is not allowed to continue, in the case of an optional reride (and the skier is not back on his skis within 3 minutes), he is credited with the score obtained in the run that brought about the reride.

15.01 1st paragraph eliminate the last sentence "If a skier noticies..."

A contestant may refuse to enter the trick course by throwing his handle in the air or by being released by the quick release operator by means of a pre-arranged signal before entering the trick course. If, in the opinion of a majority of the Event Judges, this refusal is without acceptable reason, the skier loses the right to that pass. The skier must be ready to ski immediately upon the boat's return.

If the skier's refusal is accepted, the boat must repeat the regular path and once again head for the trick course.

15.08: Proceeding through the two trick passes

The boat shall follow as closely as possible the path specified by the

Judges for the event, such path to include the preparation time before each

pass. The second pass shall be in the opposite direction from the first

pass. A skier may neither return to pick up a dropped ski nor add a second ski

between passes.

At the skier's option, if he did not fall, the boat may stop between passes for a maximum of 30 seconds, however, he may change equipment in the 30 second set down period. The 30 seconds shall start when the boat gets to the skier. At the end of 30 seconds the skier must be in the water ready to go or he loses the right to his second pass.

If a skier refuses to enter the course under the provision in Rule 15.01, and he is not ready when the boat returns for him, he shall be considered as having fallen.

15.15 c

c) In circumstances which the Chief Judge regards as exceptional, the Event Judges may review the tape. This request should not be granted if the intention is to change a Judge's decision under 15.11 (a) and (b).

15.15 add

Any time there is a 3-2 split on the last trick in time on a run of over 10,000 points, a designated qualified judge shall be appointed by the CJ to review the video. If the designated person does not agree with the judges' decision, it will then be reviewed by the Chief Judge. If both the video reviewer and the Chief judge agree, their decision will stand otherwise the event judges have to review. The official appointed to review the video shall be assigned for the whole event/series.


b) Add as follows:

For wake flips with body rotation (#54, #55), the body rotation must be done simultaneously with the flip, not before or after. The WFLIPBFB is not considered a 180 degree turn either for purposes of declared tricks as referenced in Rule 15.16 or for reverse turns as described in 15.19 c). Additionally, for the WFLIPBFB, the reverse must land in the opposite wrap or turn in the opposite direction. Also, specifically for the WFLIPBLB, the stepover portion of the trick must be done simultaneously with the flip and the body rotation.

16.07 c (add)

In jumping if a video jump system is used, the homologator will measure the exact position of the video jump buoys in the video jump buoy course.

A video jump record submission shall include the survey, a gif formatted file of the record jump, a gif file of the video grid box if in the record jump gif any of the buoys are obscured, and all configuration and setup files.

17.02 add

If it is not feasible to place the judges tower at the prescribed angle, a video camera may be mounted at the proper angle and the live signal fed to a monitor that the tower judges can observe the gate and the gate judgement will made from the monitor. The signal will be taped so that review is possible.

Trick Table

Change W7F to 800 points

Change SL7B to 750 points

Change W9B to 850 points

Change W9F to 850 points

Change SL7F to 800 points

Change TWL5F to 700

Add under trick #55 WFLIPBLB 800 points

page 72

Homologation Guidelines 1(d)

add When used in practice, the ropes should be used in rotation to give them equal use.

page 77

Trick Table Notes:

The following substitutions will be allowed on declared trick runs:

a) A reverse turn may be indicated by the letter "R" alone

b) SS may be used for S in trick numbers 1&2

c) OB may be used for BB in all tricks where it is

normally used (#5, 11, 17, 26, 32, 40, 48)

d) T5B may be used to indicate a RT5B when it immediately

follows a T7F

e) An R for reverse turns may precede or follow the trick code

f) The following variations will be allowed.

WTS for TS or RTS in #2

T7 for T7F in #12

OB or OBB for BB in #'s 5,11,17,26,32,40,51

BB for B in #'s 21,36 & 54 (T7B,TW7B,SL7B)

FLP or FL or FP for FLIP in tricks 43-47

any transposition of the letters WTB/WTF and WBflip


Rule World Record Ranking List
Slalom Course no single center line floating courses no single center line floating courses
Slalom Judges 5 1st Class 3 1st class/ 2 2nd class minimum
10,000 point review judge 1st Class Not Applicable
Video jump judges 1st Class 1-1st class/ 1-2nd class minimum
Homologation Dossier IWSF Standard Electronic IWSF Standard Electronic
Course Check SURVEY* SURVEY*
Course Check SURVEY* SURVEY*
All R or L class tournaments must meet or exceed the standards of the IWSF rule book.

*2 meter surveys are not allowed. A 3 meter survey or a 1 meter with laser range finder survey are the only acceptable methods. For a 1 meter survey, angle only spot checks from a second position are recomended.


2. Technical Rules

The technical rules shall be identical to those in the most current IWSF

Technical Rules with the exception of age and qualification restrictions as

stated above and the modifications to the Technical Rules as stated below:

Drug testing is specifically allowed for junior competitions

6.02 Number of officials at the World Juniors

World Juniors officials 7 judges, 2 from each region with 7th being named by TC Chair from the alternate nominations.

3 boat drivers


Officials list must be approved by the IWSF TC. The list shall be sent to Chairman for this approval 30 days before the start of the tournament.

World Cup must be minimum L, R recommended.

Page 82 Ranking Lists


The World Ranking List is a list of the best men and women skiers in each event ranked by performance. A Junior Ranking List is also produced for skiers meeting the Junior age critera and based on skiing under junior rules. The ranking is based on the average of each skiers' two best scores from two separate tournaments. Only one score in each event is considered from each tournament. Each IWSF Federation sanctions Record Capability or World Standings List tournaments from which the performances are taken. Performances are taken from score books and submitted by the sanctioning Federation or Region. Submitted Any trick score over 10,000 points must be performed in an R tournament to be qualified for the Ranking List.

A separate ranking list overall will be calculated on the basis of the World tournament records on a tournament by tournament basis. This means that an overall score can only be achieved for the list by having an overall performance at a tournament. Event scores from multiple tournaments will not be combined to calculate an overall score. This will be done alongside the existing ranking list for one year on a trial basis.

Scores shall be submitted containing at a minimum the following information:

Field Example
First Name Paul
ID number
Slalom performance
Trick Performance
Jump Performance 48.2
Year of Birth 78
Special Condition Code J

The ID number, if not implemented, should be left blank. However, all Federations are encouraged to implement an ID number as soon as feasible.

The alt_score is to be used to show the slalom score in buoys at line length to confirm the buoy count. A slalom score of 51 for a woman skier would have an alt_score equal to 3@12/55

Year of Birth is only mandatory for Junior age skiers.

Special Condition Code now has only one case and that is equal to J if the skier is of junior age and the event was run with junior men jump rules (max speed 51 kmph, max ramp height 1.65)

Ranking Lists are currently published three times a year for results less than one year old on the following dates: April 30, July 31, and October 31.

The normal procedure will be that performances are submitted any time up to 30 days after the results closing dates (listed above). A preliminary list will then be published. Certified changes may be submitted for 30 days after the publication of the preliminary list. At that point, results will be closed and a final list shall be published.

The lists shall be published on the World Wide Web at the IWSF Home Page

Address - http://www.iwsf.com/

If you do not have access to this method of publication, contact your federation or region administrator for a copy of the preliminary or final list.