Our compliance with environmental regulations in Mexico, including in connection with efforts to address climate change, could result in material adverse effects on our results of operations.

A wide range of general andindustry-specific Mexican federal and state environmental laws and regulations apply to our operations; these laws and regulations are often difficult and costly to comply with and carry substantial penalties fornon-compliance. This regulatory burden increases our costs because it requires us to make significant capital expenditures and limits our ability to extract hydrocarbons, resulting in lower revenues. For an estimate of our accrued environmental liabilities, see “Item 4—Information on the Company—Environmental Regulation—Environmental Liabilities.” Growing international concern over greenhouse gas emissions and climate change could result in new laws and regulations that could adversely affect our results of

operations and financial condition. International agreements, including the Paris Agreement approved by the Mexican Government, contemplate coordinated efforts to combat climate change. We may become subject to market changes, including carbon taxes, efficiency standards,cap-and-trade and emission allowances and credits. These measures could increase our operating and maintenance costs, increase the price of our hydrocarbon products and possibly shift consumer demand tolower-carbon sources. See “Item 4—4 — Environmental Regulation—ClimateRegulation —Climate Change” for more information on the Mexican Government’s current legal and regulatory framework for combatting climate change.

Risk Factors Related to Mexico

Economic conditions and government policies in Mexico and elsewhere may have a material impact on our operations.

A deterioration in Mexico’s economic condition, social instability, political unrest or other adverse social developments in Mexico could adversely affect our business and financial condition. Those events could also lead to increased volatility in the foreign exchange and financial markets, thereby affecting our ability to obtain new financing and service our debt. Additionally, the Mexican Government in the past has announced budget cuts in November 2015, February 2016, and September 2016 in response to declines in international crude oil prices, and, while the Mexican Government did not reduce our budget in 2017 and announced a budget increase in December 2018, it may cut spendingreduce our budget in the future. See “—Risk Factors Related to our Relationship with the Mexican Government—The Mexican Government controls us and it could limit our ability to satisfy our external debt obligations or could reorganize or transfer us or our assets” below. TheseAny new budget cuts could adversely affect the Mexican economy and, consequently, our business, financial condition, operating results and prospects.

In the past, Mexico has experienced several periods of slow or negative economic growth, high inflation, high interest rates, currency devaluation and other economic problems. These problems may worsen or reemerge, as applicable, in the future and could adversely affect our business and ability to service our debt. A worsening ofdeterioration in international financial or economic conditions, such as a slowdown in growth or recessionary conditions in Mexico’s trading partners, including the United States, or the emergence of a new financial crisis, could have adverse effects on the Mexican economy, our financial condition and our ability to service our debt.

Changes in Mexico’s exchange control laws may hamper our ability to service our foreign currency debt.

The Mexican Government does not currently restrict the ability of Mexican companies or individuals to convert pesos into other currencies. However, we cannot provide assurances that the Mexican Government will maintain its current policies with regard to the peso. In the future, the Mexican Government could impose a restrictive exchange control policy, as it has done in the past. Mexican Government policies preventing us from exchanging pesos into U.S. dollars could hamper our ability to service our foreign currency obligations, including our debt, the majority of which is denominated in currencies other than pesos.

Political conditions in Mexico could materially and adversely affect Mexican economic policy and, in turn, our operations.

Political events in Mexico may significantly affect Mexican economic policy and, consequently, our operations. Enrique Peña Nieto, a member of thePartido Revolucionario Institucional(Institutional Revolutionary Party or PRI), was elected President of Mexico and took office on December 1, 2012. As of the date of this annual report, no political party holds a simple majority in either house of the Mexican Congress.

Presidential and federal congressional elections in Mexico will be held in July 2018. The Mexican presidential election will result in a change in administration, as presidential reelection is not permitted in Mexico. As a result, we cannot predict whether changes in Mexican governmental policy will result from the change in administration. Political events in Mexico could adversely affect economic conditions and/or the oil and gas industry and, by extension, our results of operations and financial position.

Mexico has experienced a period of increasing criminal activity, which could affect our operations.

In recent years, Mexico has experienced a period of increasing criminal activity, primarily due to the activities of drug cartels and related criminal organizations. In addition, the development of the illicit market in fuels in Mexico has led to increases in theft and illegal trade in the fuels that we produce. In response, the Mexican Government has implemented various security measures and has strengthened its military and police forces, and we have also established various strategic measures aimed at decreasing incidents of theft and other criminal activity directed at our facilities and products. See “Item 8—Financial Information—Legal Proceedings—Actions Against the Illicit Market in Fuels.” Despite these efforts, criminal activity continues to exist in Mexico, some of which may target our facilities and products. These activities, their possible escalation and the violence associated with them, in an extreme case, may have a negative impact on our financial condition and results of operations.

Economic and political developments in Mexico and the United States may adversely affect PEMEX.Mexican economic policy and, in turn, PEMEX’s operations.

ChangesPolitical events in Mexico may significantly affect Mexican economic politicalpolicy and, regulatory conditionsconsequently, our operations. Presidential and federal congressional elections in Mexico were held on July 1, 2018. Mr. Andrés Manuel López Obrador, a member of theMovimiento Regeneración Nacional (National Regeneration Movement, or Morena), was elected President of Mexico and took office on December 1, 2018, replacing Mr. Enrique Peña Nieto, a member of thePartido Revolucionario Institucional(Institutional Revolutionary Party, or PRI). The new President’s term will expire on September 30, 2024. Thenewly-elected members of the Mexican Congress took office on September 1, 2018. As of the date of this annual report, the National Regeneration Movement holds an absolute majority in the United StatesChamber of Deputies.

The new administration and the Mexican Congress are discussing a number of reforms that could affect economic conditions or the oil and gas industry in U.S. lawsMexico. Until any reform has been adopted and implemented, we cannot predict how these policies governing foreign tradecould impact our results of operation and foreign relations could create uncertaintyfinancial position. We cannot provide any assurances that political developments in the international markets and couldMexico will not have a negative impactan adverse effect on the Mexican economy. economy or oil and gas industry and, in turn, our business, results of operations and financial condition, including our ability to repay our debt.

Economic conditions in Mexico are highly correlated with economic conditions in the United States due to the physical proximity and the high degree of economic activity between the two countries generally, including the trade facilitated by the North American Free Trade Agreement, (“NAFTA”). In addition,or NAFTA. As a result, political developments in the United States, including changes in the administration and governmental policies, can also have an impact on the exchange rate between the U.S. dollar and the Mexican peso, economic conditions in Mexico and the global capital markets.

Following the U.S. elections in November 2016 and the change in the U.S. administration, there is uncertainty regarding future U.S. policies with respect to matters of importance to Mexico and its economy. In particular, the U.S. administration has raised the possibility ofre-negotiating, or withdrawing from, NAFTA and taking actions related to trade, tariffs, immigration and taxation that could affect Mexico.

Since 2003, exports of petrochemical products from Mexico to the United States have enjoyed azero-tariff rate under NAFTA and, subject to limited exceptions, exports of crude oil and petroleum products have also been free or exempt from tariffs. During 2016,2018, our export sales to the United States amounted to Ps. 138.2434.8 billion, representing 12.8%25.9% of total sales and 35.0%62.8% of export sales for the year. On November 30, 2018, the presidents of Mexico, the United States and Canada signed the UnitedStates-Mexico-Canada Agreement, or the USMCA, which, if ratified by the legislatures of the three countries, would replace NAFTA. As of the date of this annual report, there is uncertainty about whether the USMCA will be ratified, as well as the timing thereof, and the potential for furtherre-negotiation, or even termination, of NAFTA. Any increase of import tariffs resulting from the implementation of the USMCA or there-negotiation or termination of NAFTA could make it economically unsustainable for U.S. companies to import our petrochemical, crude oil and petroleum products if they are unable to transfer those additional costs onto consumers, which would increase our expenses and decrease our revenues, even if domestic and international prices for our products remain constant. Higher tariffs on products that we export to the United States could also require us to renegotiate our contracts or lose business, resulting in a material adverse impact on our business and results of operations.

BecauseIn addition, because the Mexican economy is heavily influenced by the U.S. economy, there-negotiation, or even termination, of NAFTA and/or other U.S. government policies that may be adopted by the U.S. administrationgovernment may adversely affect economic conditions in Mexico. These developments could in turn have an adverse effect on our financial condition, results of operations and ability to repay our debt.

Risk Factors Related to our Relationship with the Mexican Government

The Mexican Government controls us and it could limit our ability to satisfy our external debt obligations or could reorganize or transfer us or our assets.

We are controlled by the Mexican Government and our annual budget may be adjusted by the Mexican Government in certain respects. Pursuant to the Petróleos Mexicanos Law, Petróleos Mexicanos was transformed from a decentralized public entity to a productivestate-owned company on October 7, 2014. The Petróleos Mexicanos Law establishes a special regime governing, among other things, our budget, debt levels,

administrative liabilities, acquisitions, leases, services and public works. This special regime provides Petróleos Mexicanos with additional technical and managerial autonomy and, subject to certain restrictions, with additional autonomy with respect to our budget. Notwithstanding this increased autonomy, the Mexican Government still controls us and has the power to adjust our financial balance goal, which represents our targeted net cash flow for the fiscal year based on our projected revenues and expenses, and our annual wage and salary expenditures, subject to the approval of theCámara de Diputados (Chamber of Deputies).

The adjustments to our annual budget mentioned above may compromise our ability to develop the reserves assigned to us by the Mexican Government and to successfully compete with other oil and gas companies that may enter the Mexican energy sector. See “Item 4—Information on the Company—History and Development—Capital Expenditures” for more information about our February 2016 budget adjustment and “—General Regulatory Framework” for more information about the Mexican Government’s authority with respect to our budget. In addition, the Mexican Government’s control over us could adversely affect our ability to make payments under any securities issued by Petróleos Mexicanos. Although Petróleos Mexicanos is wholly owned by the Mexican Government, our financing obligations do not constitute obligations of and are not guaranteed by the Mexican Government.

The Mexican Government’s agreements with international creditors may affect our external debt obligations. In certain past debt restructurings of the Mexican Government, Petróleos Mexicanos’ external indebtedness was treated on the same terms as the debt of the Mexican Government and other public sectorpublic-sector entities, and it may be treated on similar terms in any future debt restructuring. In addition, Mexico has entered into agreements with official bilateral creditors to reschedule public sectorpublic-sector external debt. Mexico has not requested restructuring of bonds or debt owed to multilateral agencies.

The Mexican Government has the power, if the Mexican Constitution and federal law were further amended, to further reorganize our corporate structure, including a transfer of all or a portion of our assets to an entity not controlled, directly or indirectly, by the Mexican Government. See “—Risk Factors Related to Mexico” above.

Our financing obligations are not guaranteed by the Mexican Government.

Although Petróleos Mexicanos is wholly owned by the Mexican Government, our financing obligations do not constitute obligations of and are not guaranteed by the Mexican Government. As a result, the Mexican Government would have no legal obligation to make principal or interest payments on our debt if we were unable to satisfy our financial obligations.

We pay significant taxes and duties to the Mexican Government, and, if certain conditions are met, we may be required to pay a state dividend, which may limit our capacity to expand our investment program or negatively impact our financial condition generally.

We are required to make significant payments to the Mexican Government, including in the form of taxes and duties, which may limit our ability to make capital investments. In 2016, approximately 32.0% of our sales revenues was used for payments2018, we paid Ps. 570.3 billion to the Mexican Government in the form of taxes and duties, which constituted a substantial portion of the Mexican Government’s revenues.

The Secondary Legislation includes changes to the fiscal regime applicable to us, particularly with respect to the exploration and extraction activities thatIn addition, we carry out in Mexico. As of 2016, we have the obligation,are generally required, subject to the conditions set forth in the Petróleos Mexicanos Law, to pay a state dividend to the Mexican Government. We were not required to pay a state dividend in 2016, 2017 and are2018 and we will not be required to do sopay a state dividend in 2017.2019. See “Item 8—Financial Information—Dividends” for more information. Although the changes to the fiscal regime applicable to us are designed in partMexican Government has on occasion indicated a willing to reduce the Mexican Government’sits reliance on payments made by us, we cannot provide assurances that we will not be required to continue to pay a large proportion of our sales revenue to the Mexican Government. See “Item 4—Information on the Company—Taxes, Duties and Other Payments to the Mexican Government—Fiscal Regime.” In addition, the Mexican Government may change the applicable rules in the future.

The Mexican Government has historically imposed price controls in the domestic market on our products.

The Mexican nation, not us, owns the hydrocarbon reserves located in the subsoil in Mexico and our right to continue to extract these reserves is subject to the approval of the Ministry of Energy.

The Mexican Constitution provides that the Mexican nation, not us, owns all petroleum and other hydrocarbon reserves located in the subsoil in Mexico.

Article 27 of the Mexican Constitution provides that the Mexican Government will carry out exploration and production activities through agreements with third parties and through assignments to and agreements with us. The Secondary Legislation allows us and other oil and gas companies to explore and extract the petroleum and other hydrocarbon reserves located in Mexico, subject to assignment of rights by the Ministry of Energy and entry into agreements pursuant to a competitive bidding process.

Access to crude oil and natural gas reserves is essential to an oil and gas company’s sustained production and generation of income, and our ability to generate income would be materially and adversely affected if the Mexican Government were to restrict or prevent us from exploring or extracting any of the crude oil and natural gas reserves that it has assigned to us or if we are unable to compete effectively with other oil and gas companies in potential future bidding rounds for additional exploration and production rights in Mexico. For more information, see “—We must make significant capital expenditures to maintain our current production levels, and to maintain, as well as increase, the proved hydrocarbon reserves assigned to us by the Mexican Government. Reductions in our income, adjustments to our capital expenditures budget and our inability to obtain financing may limit our ability to make capital investments” below.

Information on Mexico’s hydrocarbon reserves is based on estimates, which are uncertain and subject to revisions.

The information on oil, gas and other reserves set forth in this annual report is based on estimates. Reserves valuation is a subjective process of estimating underground accumulations of crude oil and natural gas that cannot be measured in an exact manner; the accuracy of any reserves estimate depends on the quality and reliability of available data, engineering and geological interpretation and subjective judgment. Additionally, estimates may be revised based on subsequent results of drilling, testing and production. These estimates are also subject to certain adjustments based on changes in variables, including crude oil prices. Therefore, proved reserves estimates may differ materially from the ultimately recoverable quantities of crude oil and natural gas. Downward revisions in our reserve estimates could lead to lower future production, which could have an adverse effect on our results of operations and financial condition. See “—Risk Factors Related to Our Operations—Crude oil and natural gas prices are volatile and low crude oil and natural gas prices adversely affect our income

and cash flows and the amount of hydrocarbon reserves that we have the right to extract and sell” above. We revise annually our estimates of hydrocarbon reserves that we are entitled to extract and sell, which may result in material revisions to these estimates. Our ability to maintain ourlong-term growth objectives for oil production depends on our ability to successfully develop our reserves, and failure to do so could prevent us from achieving ourlong-term goals for growth in production.

TheComisión Nacional de Hidrocarburos (National Hydrocarbon Commission, or CNH) has the authority to review and approve our estimated hydrocarbon reserves estimates and may require us to make adjustments to these estimates. A request to adjust these reserves estimates could result in our inability to prepare our consolidated financial statements in a timely manner. This could adversely impact our ability to access financial markets, obtain contracts, assignments, permits and other government authorizations necessary to participate in the crude oil and natural gas industry, which, in turn, could have an adverse effect on our business, results of operations and financial condition.

We must make significant capital expenditures to maintain our current production levels, and to maintain, as well as increase, the proved hydrocarbon reserves assigned to us by the Mexican Government. Reductions in our income, adjustments to our capital expenditures budget and our inability to obtain financing may limit our ability to make capital investments.

Because our ability to maintain, as well as increase, our oil production levels is highly dependent upon our ability to successfully develop existing hydrocarbon reserves and, in the long term, upon our ability to obtain the right to develop additional reserves, we continually invest capital to enhance our hydrocarbon recovery ratio and improve the reliability and productivity of our infrastructure. During 2016, our total proved reserves had a net increase of 40 million barrels of oil equivalent after accounting for discoveries, extensions, revisions, and delimitations. This amount, however, was less than production in 2016. Accordingly, our total proved reserves decreased by 11.1%, from 9,632 million barrels of crude oil equivalent as of December 31, 2015 to 8,562.8 million barrels of crude oil as of December 31, 2016. See “Item 4—Information on the Company—Business Overview—Exploration and Production—Reserves” for more information about the factors leading to this decline, including the results of Round Zero. Our crude oil production decreased by 1.0% from 2012 to 2013, by 3.7% from 2013 to 2014 and by 6.7% from 2014 to 2015 and by 5.0% from 2015 to 2016 primarily as a result of the decline of the Cantarell,Tsimín-Xux, Antonio J. Bermúdez, Chuc and Crudo Ligero projects.

Pursuant to energy reform in Mexico, the Mexican Government outlined a process, commonly referred to as Round Zero, for the determination of our initial allocation of rights to continue to carry out exploration and production activities in Mexico. On August 13, 2014, the Ministry of Energy granted us the right to continue to explore and develop areas that together contain 95.9% of Mexico’s estimated proved reserves of crude oil and natural gas. The development of the reserves that were assigned to us pursuant to Round Zero, particularlyby the reserves in the deep waters of the Gulf of Mexico and in shale oil and gas fields in the Burgos basin,Mexican Government will demand significant capital investments and will pose significant operational challenges. Our right to develop the reserves assigned to us through Round Zero is conditioned on our ability to develop such reserves in accordance with our development plans, which were based on our technical, financial and operational capabilities at the time. We cannot provide assurances that we will have or will be able to obtain, in the time frame that we expect, sufficient resources or the technical capacity necessary to explore and extract the reserves that the Mexican Government assigned to us, as part of Round Zero, or that it may grant to us in the future. The declineIn the past, we have reduced our capital expenditures in response to declining oil prices, has forced us to make adjustments to our budget, including a significant reduction of our capital expenditures. Unlessand unless we are able to increase our capital expenditures, we may not be able to develop the reserves assigned to us in accordance with our development plans. We would lose the right to continue to extract these reserves if we fail to develop them in accordance with our development plans, which could adversely affect our operating results and financial condition. In addition, increased competition in the oil and gas sector in Mexico may increase the costs of obtaining additional acreage in potential future bidding rounds for the rights to new reserves.

Our ability to make capital expenditures is limited by the substantial taxes and duties that we pay to the Mexican Government, the ability of the Mexican Government to adjust certain aspects of our annual budget, cyclical decreases in our revenues primarily related to lower oil prices and any constraints on our liquidity. The availability of financing may limit our ability to make capital investments that are necessary to maintain current production levels and increasedecrease the proved hydrocarbon reserves that we are entitled to extract. The energy reform has provided us with opportunities to enter into strategic alliances and partnerships, which may reduce our capital commitments and allow us to participate in projects for which we are more competitive. However, no assurance can be provided that these strategic alliances and partnerships will be successful or reduce our capital commitments. For more information, see “Item 4—Information on the Company—History and Development—

Capital Expenditures” and “—Energy Reform.” For more information on the liquidity constraints we are exposed to, see “—We have a substantial amount of indebtedness and other liabilities and are exposed to liquidity constraints, which could make it difficult for us to obtain financing on favorable terms and could adversely affect our financial condition, results of operations and ability to repay our debt and, ultimately, our ability to operate as a going concern” above.

In addition, we have entered into strategic alliances, joint ventures and other joint arrangements with third parties in order to develop our reserves. If our partners were to significantly default on their obligations to us, we may be unable to maintain production levels or extract from our reserves. Moreover, we cannot assure you that these strategic alliances, joint ventures and other joint arrangements will be successful or reduce our capital commitments. For more information, see “—Risk Factors Related to Pemex’s Operations—We participate in strategic alliances, joint ventures and other joint arrangements. These types of arrangements may not perform as expected, which could harm our reputation and have an adverse effect on our business, results of operations and financial condition” above and “Item 4—Information on the Company—History and Development—Capital Expenditures.”

The Mexican Government has historically imposed price controls in the domestic market on our products.

The Mexican Government has from time to time imposed price controls on the sales of natural gas, liquefied petroleum gas, gasoline, diesel, gas oil intended for domestic use, fuel oil and other products. As a result of these price controls, we have not been able to pass on all of the increases in the prices of our product purchases to our customers in the domestic market when the peso depreciates in relation to the U.S. dollar. A depreciation of the peso increases our cost of imported oil and gas products, without a corresponding increase in our revenues unless we are able to increase the price at which we sell products in Mexico.

In accordance with theLey de Ingresos de la Federación para el Ejercicio Fiscal de 2017 (2017 Federal Revenue Law), during 2017 the Mexican Government gradually removed price controls on gasoline and diesel as part of the liberalization of fuel prices in Mexico. As of the date of this annual report, sales prices of gasoline and diesel have been fully liberalized and are determined by the free market. For more information, see “Item 4—Information on the Company—Business Overview—Industrial Transformation.” However, we do not control the Mexican Government’s domestic policies and the Mexican Government could impose additional price controls on the domestic market in the future. The imposition of such price controls would adversely affect our results of operations. For more information, see “Item 4—Information on the Company—Business Overview—Refining—Pricing Decrees” and “Item 4—Information on the Company—Business Overview—Gas and Aromatics—Pricing Decrees.”

We may claim some immunities under the Foreign Sovereign Immunities Act and Mexican law, and your ability to sue or recover may be limited.

We arepublic-sector entities of the Mexican Government. Accordingly, you may not be able to obtain a judgment in a U.S. court against us unless the U.S. court determines that we are not entitled to sovereign immunity with respect to that action. Under certain circumstances, Mexican law may limit your ability to enforce judgments against us in the courts of Mexico. We also do not know whether Mexican courts would enforce judgments of U.S. courts based on the civil liability provisions of the U.S. federal securities laws. Therefore, even if you were able to obtain a U.S. judgment against us, you might not be able to obtain a judgment in Mexico that is based on that U.S. judgment. Moreover, you may not be able to enforce a judgment against our property in the United States except under the limited circumstances specified in the Foreign Sovereign Immunities Act of 1976, as amended. Finally, if you were to bring an action in Mexico seeking to enforce our obligations under any securities issued by Petróleos Mexicanos, satisfaction of those obligations may be made in pesos, pursuant to the laws of Mexico.

Our directors and officers, as well as some of the experts named in this annual report, reside outside the United States. Substantially all of our assets and those of most of our directors, officers and experts are located outside the United States. As a result, investors may not be able to effect service of process on our directors or officers or those experts within the United States.

Item 4.       Information on the Company

HISTORY AND DEVELOPMENT

We are the largest company in Mexico according to the June 2016 specialJuly 2018 edition ofExpansiónmagazine, and according to the November 21, 201619, 2018 issue ofPetroleum Intelligence Weekly,we were the eighthlargesttenthlargest crude oil producer and the eighteenthnineteenth largestoil and gas company in the world based on data from the year 2015.2017.

Our executive offices are located at Avenida Marina Nacional No. 329, Colonia Verónica Anzures, 11300, Alcandía Miguel Hildalgo, Ciudad de México, 11300, México. Our telephone number is(52-55) 1944-2500.9126-8700.

In March 1938, President Lázaro Cárdenas del Río nationalized theforeign-owned oil companies that were then operating in Mexico, and the Mexican Congress established Petróleos Mexicanos through theDecreto que crea la Institución Petróleos Mexicanos (Decree that creates the entity Petróleos Mexicanos), which was published in the Official Gazette of the Federation and took effect on July 20, 1938.

In July 1992, theLey Orgánica de Petróleos Mexicanos y Organismos Subsidiarios (Organic Law of Petróleos Mexicanos and Subsidiary Entities) took effect and, among other things, created Pemex-Exploration and Production, Pemex-Refining,Pemex-Gas and Basic Petrochemicals and Pemex-Petrochemicals as decentralized public entities of the Mexican Government with the legal authority to own property and conduct business in their own names. Each of the subsidiary entities had the characteristics of a subsidiary of Petróleos Mexicanos. The principal lines of business of those subsidiary entities were as follows:

Energy Reform

Energy Reform DecreeLegal Regime

On December 20,21, 2013, amendments to Articles 25, 27 and 28 of the Mexican Constitution were signed into law by President Enrique Peña Nieto and published in the Official Gazette of the Federation. We refer to this as the Energy Reform Decree. The Energy Reform Decree, which includestook effect, including transitional articles setting forth the general framework and timeline for implementing legislation relating to the related secondary legislation, took effect on December 21, 2013.

Secondary Legislationenergy sector.

On August 11, 2014, the secondarythis implementing legislation was published pursuant to the Energy Reform Decree in the Official Gazette of the Federation. We refer in this annual report to thisThe implementing legislation as the Secondary Legislation. The Secondary Legislation includes nine new laws, of which the following are most relevant to our operations:

•

Hydrocarbons Law, which took effect on August 12, 2014 and repealed theLey Reglamentaria del Artículo 27 Constitucional en el Ramo del Petróleo(Regulatory Law to Article 27 of the Mexican Constitution Concerning Petroleum Affairs, which we refer to as the Regulatory Law); and

Together, the Hydrocarbons Law and the Hydrocarbons Revenue Law establish the legal framework for the exploration and production of oil and gas through assignments and contracts, as well as the new fiscal regime through which the Mexican Government will collectcollects revenues from participants in the Mexican oil and gas industry. The Hydrocarbons Law empowers the Ministry of Energy to determine the appropriate contract model for each area that is subject to a competitive bidding process, while the Ministry of Finance and Public Credit is responsible for determining the economic and fiscal terms of each contract. See “—Taxes, Duties and Other Payments to the Mexican Government—Fiscal Regime” below in this Item 4. The following arrangements comprise the new contractual regime established by the Secondary Legislationcurrent legal framework for upstream activities:

The fiscal terms of each contract for exploration and production are to be established in accordance with the Hydrocarbons Revenue Law. See “—Taxes, Duties and Other Payments to the Mexican Government—Fiscal Regime” below in this Item 4.

For midstream and downstream activities, including oil refining and natural gas processing, the Hydrocarbons Law establishes a permit regime that is granted by the Ministry of Energy and the EnergyComisión Reguladora de Energía (Energy Regulatory Commission, or CRE), as applicable. The Hydrocarbons Law also sets forth the process by which entities may apply for these permits. The Energy Regulatory Commission began issuingCRE has issued permits for the retail sale of gasoline and diesel fuel insince 2016. During 2017 and 2018,

Under the Energy Regulatory Commission, with the opinion of theComisión Federal de Competencia Económica (Federal Economic Antitrust Commission), will issue guidelines and schedules for different regions in Mexico relating to the processes to be used by the Ministry of Finance and Public Credit to determine prices of gasoline and diesel, which will take into account, among other things, transportation costs and volatility in international prices. Beginning in 2018, the prices of gasoline and diesel fuel will be freely determined by market conditions.

Legal Regime for Petróleos Mexicanos

As part of energy reform, Petróleos Mexicanos was transformed from a decentralized public entity into a productive state-owned company on October 7, 2014—the day on which the new Petróleos Mexicanos Law, took effect, with the exception of certain provisions. As a productive state-owned company, Petróleos Mexicanos remainsis a productivestate-owned company, wholly owned by the Mexican Government, and has the corporate purpose of generating economic value and increasing the income of the Mexican nation while adhering to principles of equity, as well as social and environmental responsibility.

On December 2, 2014, upon its determination that the new Board of Directors of Petróleos Mexicanos was performing its duties and the mechanisms for our oversight, transparency and accountability had been implemented, the Ministry of Energy formally announced in the Official Gazette of the Federation that the

special regime provided for in the Petróleos Mexicanos Law, which governs Petróleos Mexicanos’ activities relating to productivestate-owned subsidiaries, affiliates, compensation, assets, administrative liabilities, budget, debt levels and the state dividend, had takentook effect. On June 10, 2015, theDisposiciones Generales de Contratación para Petróleos Mexicanos y Sus Empresas Productivas Subsidiarias (General Provisions for Contracting for Petróleos Mexicanos and its ProductiveState-Owned Subsidiaries) were published in the Official Gazette of the Federation, and on June 11, 2015, the special regime for acquisitions, leases, services and public works became effective.

Corporate Reorganization

In accordance with the transitional articles of the Petróleos Mexicanos Law, on November 18, 2014, the Board of Directors of Petróleos Mexicanos approved the Director General’s proposal for our corporate reorganization. In our corporate reorganization, the four existing subsidiary entities of Petróleos Mexicanos were transformed into two new productive state-owned subsidiaries—Pemex Exploration and Production and Pemex Industrial Transformation—and five new productive state-owned subsidiaries—Pemex Drilling and Services, Pemex Logistics, Pemex Cogeneration and Services, Pemex Fertilizers and Pemex Ethylene—were created. Each of these productive state-owned subsidiaries is a legal entity empowered to own property and carry on business in its own name and has technical and operational autonomy, subject to the central coordination and strategic direction of Petróleos Mexicanos.

On March 27, 2015, the Board of Directors of Petróleos Mexicanos adoptedacuerdos de creación (creation resolutions) for each of the new productive state-owned subsidiaries, all of which were subsequently published in the Official Gazette of the Federation on April 28, 2015.Structure

The principal lines of business of the new productivestate-owned subsidiaries are as follows:

Capital Expenditures

The following table shows our capital expenditures, excludingnon-capitalizable maintenance, for each of the three years ended December 31, 2016, and2018, as well as the budget for these expenditures for 2017.2019. Capital expenditure amounts are derived from our budgetary records, which are prepared on a cash basis. Accordingly, these capital expenditure amounts do not correspond to capital expenditure amounts included in our consolidated financial

statements prepared in accordance with IFRS. The following table presents our capital expenditures by subsidiary. For the year ended December 31, 2015, we have included capital expenditures made by the subsidiary entities prior to our recent corporate reorganization, and for the new productive state-owned subsidiaries, capital expenditures made after their creation. For the year ended December 31, 2016 and for the 2017 budget, we have included capital expenditures made by, or expected to be made by the new productivestate-owned subsidiaries. subsidiary.

Capital Expenditures and Budget by Subsidiary

Source: Petróleos Mexicanos.

The following table shows our capital expenditures, excludingnon-capitalizable maintenance, by segment for the years ended December 31, 20152017 and 20162018 and the budget for these expenditures in 2017.2019.

Capital Expenditures by Segment