What league do speed ups kick in?

[Attila]

I keep my medals fairly low. Can I please get an answer on what league you need to be in to start receiving speed ups? I have a lvl 3 archive and have had a few league boats and victory chests come by but I haven't seen any speed ups yet. I'm in copper III around 450 medals.

 

[yemen]

I have gotten 5 minute ones in copper. 6 hour ones in kingdom. I think I got a 1 hour in silver.