Question
As a provider, I want to configure different notification schedules (both before and after subscription expiration dates) for subscriptions based on different service plans/subscription periods (as different registrars have different policies, there are trial periods with special requirements, other reasons).
Answer
Create and configure the required number of the notification schedules:
http://download.pa.parallels.com/pba/5.5/doc/23511.htm
http://download.pa.parallels.com/pba/5.5/doc/23512.htm
You may find an example in the documentation.
Attach the specific notification schedule to the specific service plan: