years

The number of years that you want to specify for the default retention period. Either days or years must be specified, but not both.

NOTE on object_lock_configuration: You can only enable S3 Object Lock for new buckets. If you need to turn on S3 Object Lock for an existing bucket, please contact AWS Support. When you create a bucket with S3 Object Lock enabled, Amazon S3 automatically enables versioning for the bucket. Once you create a bucket with S3 Object Lock enabled, you can't disable Object Lock or suspend versioning for the bucket.