Conversation so far:
What were the special economic zones?
At the end of May 2016, Pena Nieto signed a law that will create special economic zones in economically underdeveloped southern states.
Why did he create the zones?
The special economic zones are meant to alleviate the lack of industry in the South.

Question: What states were these zones in?
Self-contained rewrite: What states were Enrique Peña Nieto's special economic zones in?