Special Information for Amazon S3 Policies

The maximum size of a policy is 20 KB

The value for Resource must be prefixed with the bucket name or the bucket name and a path under it (bucket/*). If only the bucket name is specified, without the trailing /*, the policy applies to the bucket.

Each policy must have a unique policy ID (Id)

Each statement in a policy must have a unique statement ID (sid)

Each policy must cover only a single bucket and resources within that bucket (when writing a policy, don't include statements that refer to other buckets or resources in other buckets)