{"id":"iam-cross-account-needs-both-policies","text":"For cross-account access, both a resource-based policy on the resource and an identity-based policy on the principal are needed; for same-account access, a resource-based policy alone suffices.","truth_value":"IN","source":"entries/2026/03/08/iam-policies.md","source_url":"","source_hash":"461949800f4e3d9e","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"iam-cross-account-needs-both-policies","truth_value":"IN","reason":"premise"}]}}