UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: July 23, 2012 9:30 A.M.
Form: F-4
CIK: 0000932782
Company Name: MEXICAN PETROLEUM
File Number: 333-182553
CIK: 0000932783
Company Name: PEMEX EXPLORATION & PRODUCTION
File Number: 333-182553-03
CIK: 0000932784
Company Name: PEMEX REFINING
File Number: 333-182553-02
CIK: 0000932785
Company Name: PEMEX GAS & BASIC PETROCHEMICALS
File Number: 333-182553-01