Solved

Volunteering relegation

If I leave a league when I am in Elite (don't join a new one right away). 

How many moths do I need to be inactive to get relegated to Pro or Rookie? Guess you join same tier clas after a year away

If you leave a league as an Elite team and then take a break, you will rejoin as Elite the next time you play, no matter how long the break lasts.

Ok. Thank you Kevin. 
Didn't know that because I raced against a level 20-25 in rookie once