On March 21, 2014 Petróleos Mexicanos (Pemex) submitted its "round zero" proposal to the Secretaría de Energía (SENER), Mexico's department of energy. Although the details of the proposal are not yet public, SENER has indicated Pemex seeks to retain control of all areas in which it is currently producing hydrocarbons in commercial quantities and all exploration areas in which it has made a commercial discovery, including areas in the deep waters of the Gulf of Mexico. In the southern basins, Pemex seeks to retain control of all exploration areas which overlap with producing areas and in which it has made significant investments under an exploration program.
In all, Pemex has requested an assignment of over 83% of the total proved and probable (2P)  reserves and 31% of all prospective resources known to exist within the Mexican territory (see map below).  These include all areas that are currently being explored and developed under fourteen full service contracts (contratos de servicios integrales) and a few shale areas in which Pemex intends to develop know-how for future unconventional exploration and production.
Under the proposal, Pemex releases significant blocks within Chicontepec and Mexico's northern shale areas. These sub-areas will revert to the State and be offered in future international bidding rounds under the new legal framework.
Pemex now has until mid-September 2014 to show SENER that it has the technical, financial, operational and technical capacities to efficiently and competitively explore and exploit hydrocarbons from the areas it is requesting in assignment.  How Pemex will do that, however, is unclear at this time.
Though the burden will be low with respect to an area in which the company is currently producing hydrocarbons,  the burden with respect to some exploration areas, particularly those in deep waters and containing shale resources, will be greater. Pemex simply does not have the technical capacity to develop such areas nor the financial capacity to on its own acquire or develop the technology to explore and exploit hydrocarbons therein. Thus, it is not unlikely that Pemex will seek to partner-up quickly with domestic and foreign-owned oil companies and through them prove to SENER that it has one or more of the required capacities. All this is surely being discussed among the interested parties at this time.
Once an assignment is completed, Pemex will have the ability to request its "migration," a de facto amendment thereto, to a license or other authorized form of upstream arrangement, provided that if Pemex seeks to enter into a contract with a private party, the upstream regulator will need to conduct a public bidding process to select a contractor.
All areas released by Pemex, including 69% of Mexico's prospective areas, are now subject to being auctioned off to the highest bidder once the Mexican Constitution's implementing legislation is enacted. According to a few unofficial pronouncements, the government may call for bids as early as June 2015.
For additional details on Mexico's new energy proposals, visit www.energylawexchange.com/tag/mexican-energy-reform/