Hello Marco,
You should be able to install the same Large Deployment License on all three ACS servers.
One of the Distributed Deployment requirements is to have DIFFERENT licenses on all of your ACS servers. However, that requirement refers to the BASE server license installed on the servers.
As long as you have three different BASE licenses installed on your ACS servers you can install the upgrade license file (Large Deployment License) being the same on the three of them.
If this was helpful please rate.
Regards.