Final answer:
It is not generally required to rebook B inventory for customers with Basic Economy fares impacted by schedule changes. Airlines have their own policies, so the airline's contract of carriage or tariffs should be consulted for accurate information.
Step-by-step explanation:
If a customer is impacted by a schedule change and they were originally ticketed on a Basic Economy fare, the airline's policies regarding involuntary changes would apply. It is not typically required to rebook into 'B inventory' or a higher booking class for customers in these situations. Airlines often have specific rules related to involuntary changes, which may allow passengers ticketed in Basic Economy to be rebooked into the same fare class without additional charges.
However, it is crucial to refer to the specific airline's contract of carriage or tariffs for accurate information, as these documents outline the responsibilities and obligations the airline has toward its passengers in case of schedule changes. Furthermore, in some cases, if there is no available inventory in the Basic Economy class, the airline may book the customer into a higher class without extra cost, but this varies by airline and specific scenario.