My guess is there's something really fishy about this plan (even though it doesn't cover fish). Maybe they want to label a can of chili to display the origin of each and every ingredient? Nah, they wouldn't dream of doing anything THAT stupid.
That's the point. Also the cost of verifying that your sources identified their sources correctly can be expensive.
On the other hand, most of the stuff I buy does say where it comes from. Most contries like to brag. In the US, many items are labeled by state.
How do you label things like fresh vegetables? Put them in plastic wrap with a label?