Which statement about Amazon S3 buckets in regions other than the US standard is correct?

The statement that Amazon S3 buckets in regions other than the US standard do not provide read after write consistency for PUTS of new objects is correct. S3 offers strong read after write consistency for new objects within the same bucket, but this is contingent on specific conditions and depends on the bucket's configuration and the operations performed. In regions outside of the US standard, there may be variations in consistency, particularly with regard to how changes are propagated.

Read after write consistency ensures that immediately after a successful write operation, subsequent read requests will retrieve the object, reflecting the latest changes. While this is a consistent behavior for new objects in Amazon S3, not all regions uniformly guarantee this consistency model. Hence, stating that buckets in regions other than the US standard do not provide this behavior highlights an important aspect of S3's operational characteristics and the need for developers to be aware of the potential for differences in consistency models based on the chosen region.

This understanding is critical for applications relying on immediate data availability after a write operation, as developers might need to implement extra mechanisms or choose their regions carefully based on the consistency guarantees provided.