Licensing for SQL Server is all about paper, the instances themselves have no idea how they are licensed.
Go speak with whoever did the software purchasing or is responsible for vendor contracts.
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass