After reading the document I still have a confusion.
B.4.1. An NOC can enter a maximum of two (2) boats per event at the Olympic Games, Tokyo 2020.
So if a NOC obtained C2 and C1 quota, the C1 athlete and one of the C2 athletes could enter 2 boats in C1 event. While it doesn't clearly requires that at least 1 boat obtained boat quota place. So does it mean if the NOC obtained C2 quota only, the 2 C2 athletes could also participate C1 at the same time and also sent 2 boats? @dcro@JoshMartini007
The same logic also applies to K4 and K2, K2 and K1.