If the item is a type of cuisine that would permit from the FDA. Manufacturers need to obtain permit To customers or consumers will be able to trust in the company's product/item, there should be some FAD phek.
If a food product has to be licensed by the FDA. Manufacturers need to be licensed. To customers or consumers can trust the company / product should have some aspect to FAD.
If the product is a kind of food must obtain permission from the FDA Manufacturers need to get permission To customers or consumers will trust in our products / goods in the เภค should have FAD