Every bucket and object in Amazon S3 has an owner, the user that created the bucket or object. The owner of a bucket or object cannot be changed. However, if the object is overwritten by another user (deleted and rewritten), the new object will have a new owner.

Note: Even the owner is subject to the ACL. For example, if an owner does not have Permission.READ access to an object, the owner cannot read that object. However, the owner of an object always has write access to the access control policy (Permission.WriteAcp) and can change the ACL to read the object.