[j-nsp] MX sw license

[Marlon Duksa]

Does anyone know if sw license is required for a lab use on MX in 9.2? These
are the messages that we are getting:
admin at mx-re0> show system alarms
2 alarms currently active
Alarm time               Class  Description
2008-10-17 17:24:30 PDT  Minor  License grace period for feature 31 is about
to expire
2008-10-17 17:23:29 PDT  Minor  Radius/SDX Address Pool Assignment usage
requires a license

Is this licensing honorary based or does it actually prevent  a feature from
working?
Thanks,
Marlon