Individual allowed tiers of tanks
FACEIT competitions for World of Tanks can have a minimum and/or maximum tier of tanks. In case you choose a tier higher or lower than is allowed, the opposite team will automatically win the round.
Team-based total of tiers of tanks
There can also be a maximum tier total per team. In the tank selection screen, you will see the total sum of your team's current selection. When the total exceeds the maximum tier allowed, the number will become red. When not changed, the victory will be automatically assigned to the opposite team.