Post Carbon Fellow Richard Heinberg was quoted in this article on NAFTA and proportionality.

From the article:

Proportionality is “unique in all of the world’s treaties,” writes Richard Heinberg, a noted California energy expert. Cyndee Todgham Cherniak, aToronto trade lawyer, says the energy chapter is unique for a trade agreement. There are only three free trade agreements in the world that have energy chapters, and the other two don’t have NAFTA-like proportionality clauses.

It’s unclear how many other countries the U.S. has tried to impose an energy proportional sharing chapter on, but it is clear none has bitten. Heinberg concludes that “Canada has every reason to repudiate the proportionality clause, and to do so unilaterally and immediately.”