In PLDS licensing, the version of the system licensed is part of the license file. It appears as <Version>10</VERSION> near the top of the file and it only supports single part version numbers, eg. U and X, not U.V and X.Y.
So basically a PLDS license file for 10 is currently a license file for 10.0 and 10.1 and should it they ever exist 10.2, 10.3, etc.
I say currently because I'm sure Avaya with eventually manage to engineer it so that the license file for Release 12 will need to say <VERSION>14</VERSION> or some other complexification.
Stuck in a never ending cycle of file copying.