templateS3Uri

The location of the file containing the template body (s3://bucketname/prefix). The uri must point to a conformance pack template (max size: 300 KB) that is located in an Amazon S3 bucket in the same Region as the conformance pack.

You must have access to read Amazon S3 bucket. In addition, in order to ensure a successful deployment, the template object must not be in an archived storage class if this parameter is passed.