Hi Robert.
I had a very bad experience with the BR2 subscription license.
Despite entering the license key, the system kept displaying messages about the grace period expiring (CPI9E75, BRM1142).
And when the grace period finally expired... the product stopped working (BRM1159), even with the correct license key applied. IBM said that wouldn't happen...
I advise you to contact IBM support, and they will tell you which PTFs (vol 1000, not in ptfgrp) you need to apply to prevent this.
Please see:
https://www.ibm.com/mysupport/s/fix-information/aDrgJ0000003ZfZSAU/fi0137284
https://fortradocs.atlassian.net/wiki/spaces/IWT/pages/165642445/List+of+BRMS+Service+Packs
I hope this helps you avoid the same problem I encountered.
Regards