This is a critical account of the regulatory framework governing Mexico’s upstream petroleum sector, as a result of the energy reform passed by Congress in 2013 and 2014. Despite the high expectations raised by the opening of the Mexican oil sector towards a market-friendly investment regime, my main argument is that there is set of institutional shortcomings present at the oil regulatory model in force, making the energy reform’s liberalization objective far from being complete. Based upon a political economy approach toward institutions and a comparative analysis of the Norwegian petroleum regime, the present case study applies a concept of checks and balances –as governing standard– to evaluate the new governance model by which the Mexi...