Number of rounds played at London Open and World Championships day1

[vakundekel]

Hello, is there a resource I would be able to reference to determine the amount of rounds in tournaments that consist only of swiss rounds, like the London Open and World Championships day1?

Is the amount of the rounds the same as in Variant #2: TCG Single Day as referenced in 4.6.3.2 of the tournament rules, or is it different?

Thank you.

 

[bulbasnore]

Premier events with unique structures run by TPCi would have the number of rounds determined by TPCi.