Lets say you have an item in question and don't know who makes it.
It is worthless at a federal level to enforce freshness dating.
Below is a sample page found when clicking a food manufacturer "contact us" link.
This will be a growing page of deciphering food product coding.
It is divided into 3 parts; food coding, emailing manufacturer and company website addys.
* Use Old El Paso canned green chiles, canned enchilada sauce, and dry rice mixes within 18 months of production.