The results for the shallow-water tracts mark a rebound after a closely watched first phase in July flopped with only two of 14 areas awarded and raised doubts about the new competitive era promised for Mexico's oil sector.

The outcome attests to both the hard work of the government as well as confidence in the market despite a tough commodities market, the head of Mexico's National Hydrocarbons Commission (CNH) told reporters after the round on Wednesday.

"In