Kata tournament rules are depend on the comp size. Typically;
for 1st round: Shitei kata referee's choice (from Heian shodan to Tekki shodan) - Red/white flag system,
for 2nd round: Sentei kata referee's choice (from Jion, Empi, Bassai D, and Kanku D) - Red/white flag system,
for final: Shido kata competitor's choice (from the rest of Katas) - Point system.