Status: IN
AWS Billing Conductor automatic operations (e.g., AutoAssociateAccount) appear in CloudTrail as `eventType: AwsServiceEvent` with `invokedBy: billingconductor.amazonaws.com`, while user-initiated calls appear as `AwsApiCall`.
Source: entries/2026/03/12/billingconductor-latest-userguide-logging-using-cloudtrailhtml.md