unusedReservationBillingOwnerId

The ID of the AWS account to which to assign billing of the unused capacity of the Capacity Reservation. A request will be sent to the specified account. That account must accept the request for the billing to be assigned to their account. For more information, see Billing assignment for shared Amazon EC2 Capacity Reservations . You can assign billing only for shared Capacity Reservations. To share a Capacity Reservation, you must add it to a resource share. For more information, see AWS::RAM::ResourceShare .