SAIL NUMBER COMPLIANCE - Taken from International site
Worlds Competitors - Make sure you arrive with proper number and ID on your sails before measurement. We cannot guarantee extra numbers or a sail loft availability in Garda.29er Class RulesC.1.4. The sail number shall be either:(i) If either of the crew have finished in the top 50 in the preceding 29er world championship then their sail number shall be that place, 1st to 9th single digit, otherwise two digits.(ii) Otherwise, the number shall be that shown on the ICA class plaque and shall be three digits. Boat # 15 = 015 or Boat # 2345 = 345. The digits that precede the last three digits shall be red.