+L<FS::cust_bill_event> - (Old) Completed invoice event class
+
+L<FS::part_event> - (New) Billing event definition class
+
+L<FS::part_event_option> - (New) Billing event option class
+
+L<FS::part_event::Condition> - (New) Billing event condition base class
+
+L<FS::part_event::Action> - (New) Billing event action base class
+
+L<FS::part_event_condition> - (New) Billing event condition class
+
+L<FS::part_event_condition_option> - (New) Billing event condition option class
+
+L<FS::part_event_condition_option_option> - (New) Billing event condition compound option class
+
+L<FS::cust_event> - (New) Customer event class