If you read the original article it tries for a long time to figure this requirement out and it's just arbitrary and apparently rarely ever checked (so also not checked for other pasta products, imported or not). The requirement also doesn't match those in other countries, e.g. in the EU you probably can't sell this product as its not allowed to be enriched (same as all US products have to black out their ridiculous and evidence-free health claims when selling in the EU; any "American food" section will have stickers over these parts of the packaging).

So while you are technically correct that the product is substandard, you could well argue that the issue is the arbitrary standard rather than the actual product.