I just found this, "Fuel Fix" from the Houston Chronicle" July 14 2015.
Bidding for Mexico"s Gulf blocks to open Wednesday, with Exxon, Chevron
among other interested US companies .
Mexico's regulators expect on Wednesday july 14, 2015 to complete the first
auction in an ambitious program that will open the country's oil and gas sector
to private companies after decades of state control. This is the first time in more
than 75 years that an entity other than Pemex is going to be able to own physical
oil inside of Mexico.
Those oil companies don't give a crap about environmentally hazardous.