“What didn’t go in is regulating as if you left out 164 nations"?

Does “What didn’t go in is regulating as if you left out 164 nations" mean "“What was not written down in the accord is that the accord is made as if you omitted 164 nations"?

Context:
Pollution from Planes and Ships Left Out of Paris Agreement
The fast growing sources dropped out of the climate change accord over the course of negotiations
After 195 nations agreed to commit nearly all of the world’s countries to cut greenhouse gas emissions, heads of state praised the accord and the people who made it happen.
President Obama said the deal “sends a powerful signal,” deeming it a possible “turning point for the world.” Brazilian President Dilma Rousseff called the final version balanced and long-lasting, and U.K. Prime Minister David Cameron said “the nations of the world have shown what unity, ambition and perseverance can do.”
However, the agreement has at least two conspicuous holes: ships and planes.
“What didn’t go in is regulating as if you left out 164 nations,” James Corbett, a professor of marine science and policy as well as civil and environmental engineering at the University of Delaware, said in an interview.
Taken together, he explained, emissions from the aviation and shipping industries represent about 5 percent of humanity’s total emissions—the approximate equivalent of the collective carbon footprint from the planet’s least-polluting 164 nations, he explained.

MOre:
http://www.scientificamerican.com/article/pollution-from-planes-and-ships-left-out-of-paris-agreement/