The WTO has just ruled that requiring the labeling of dolphin safe tuna is an unacceptable restraint of trade:

International trade deals like the Trans-Pacific Partnership (TPP) need to be carefully examined piece by piece because they can take precedence over a country’s own laws.

Case in point: the World Trade Organization (WTO) on Friday ruled that dolphin-safe tuna labeling rules — required by U.S. law, in an effort to protect intelligent mammals from slaughter — violate the rights of Mexican fishers.

As a result, the U.S. will have to either alter the law or face sanctions from Mexico.

I wrote a few weeks ago about how the “investor-state dispute settlement system” baked into trade agreements can force countries to compensate corporations when regulations cut into their profits.

The long-running quarrel over tuna reveals another way that domestic laws can be overturned by trade agreements: when countries can file trade challenges on behalf of domestic industries.

“This should serve as a warning against expansive trade deals like the Trans-Pacific Partnership that would replicate rules that undermine safeguards for wildlife, clean air, and clean water,” said the Sierra Club’s Ilana Solomon in a statement.

This short of crap is a feature of trade deals, not a bug.