Each team will have to achieve a certain amount of Laps to qualify for the rewards. 
If your team qualify for the rewards it mean that you are guaranteed to receive at least one of the rewards! 

If your team hasn't reached the amount of Laps to qualify, a message in the REWARDS section will warn you.

Otherwise you can check the TEAM tab to see the list of currently qualified or not qualified Teams.

When the event is over, you will be able to claim the Rewards based on your final team's ranking.