Question: The Jubilee Oil Field is under the ownership of what statutory body from Ghana?

Context paragraphs:
Kosmos Energy: Kosmos Energy is an American international oil company founded and based in Dallas, Texas.  It is incorporated in Bermuda and has offices in Ghana, Mauritania, Senegal and Suriname.  The company holds production and development operations offshore Ghana, in addition to discoveries and further exploration operations offshore Mauritania and Senegal, and exploration licenses offshore Sao Tome and Principe, Morocco and Western Sahara.  It has been involved in the discovery and development of the Jubilee oil field off the coast of Ghana.  Kosmos was a focus of a documentary "Big Men" that followed the company as it worked to establish the Jubilee oil field in Ghana.

Round Mountain Oil Field: The Round Mountain Oil Field is a large oil and gas field in the foothills of the Sierra Nevada, about 10 mi northeast of Bakersfield, California, United States.  It is east of the giant Kern River Oil Field, one of the largest in the United States, and also close to the Mount Poso Oil Field and Kern Front Oil Field.  With a cumulative total recovery of more than 110 Moilbbl of oil, it is the 48th largest oil field in California, but remains relatively productive with still about ten percent of its reserves remaining in the ground, according to the California Department of Oil, Gas, and Geothermal Resources (DOGGR).

Tweneboa Enyenra Ntomme Oil Field: The Tweneboa Enyenra Ntomme Oil Field is an oil field within Ghana's territorial waters and the country's second major oil field after the Jubilee Oil Field.  It is popularly known as the TEN oil field, an acronym formed from the three drilling fields that it comprises.  Coincidentally, the exploration for oil in the basin also started with ten pre-first oil wells.

Šamac oil field: The Šamac oil field is an oil field located in Šamac.  It was discovered in 2004 and developed by Energopetrol.  The total proven reserves of the Šamac oil field are around 3.6 billion barrels (500×10tonnes), and production is supposed to be centered on 200000 oilbbl/d .  If the information regarding this oil field is correct than it is the largest onshore oil field in Europe.

National Petroleum Authority: National Petroleum Authority is a statutory body set up by the Government of Ghana to regulate, oversee and monitor the Ghanaian petroleum industry.  The authority was established after calls by the general public for efficiency, growth and stakeholder satisfaction in the industry.

Domunli Gas Processing Project: Domunli Gas Processing Project is the company that oversees the activities of gas processing in Domunli in the Western Region of Company.  It is a Government of Ghana company under the Ministry of Energy of Ghana.  The project is to enable natural gas to flow from the Jubilee oil field to generate 500 megawatts of electricity.

South Belridge Oil Field: The South Belridge Oil Field is a large oil field in northwestern Kern County, San Joaquin Valley, California, about forty miles west of Bakersfield.  Discovered in 1911, and having a cumulative production of over 1500 Moilbbl of oil at the end of 2008, it is the fourth-largest oil field in California, after the Midway-Sunset Oil Field, Kern River Oil Field, and Wilmington Oil Field, and is the sixth-most productive field in the United States.  Its estimated remaining reserves, as of the end of 2008, were around 494 Moilbbl , the second-largest in the state, and it had 6,253 active wells.  The principal operator on the field was Aera Energy LLC, a joint venture between Royal Dutch Shell and ExxonMobil.  Additionally, the field included the only onshore wells in California owned and operated by ExxonMobil.

Summerland Oil Field: The Summerland Oil Field (and Summerland Offshore Oil Field) is an inactive oil field in Santa Barbara County, California, about four miles (6 km) east of the city of Santa Barbara, within and next to the unincorporated community of Summerland.  First developed in the 1890s, and richly productive in the early 20th century, the Summerland Oil Field was the location of the world's first offshore oil wells, drilled from piers in 1896.  This field, which was the first significant field to be developed in Santa Barbara County, produced 3.18 million of barrels of oil during its 50-year lifespan, finally being abandoned in 1939-40.  Another nearby oil field entirely offshore, discovered in 1957 and named the Summerland Offshore Oil Field, produced from two drilling platforms in the Santa Barbara Channel before being abandoned in 1996.

Jubilee Oil Field: The Jubilee oil field is an oil field located off the coast of the Ghana's Western Region in the South Atlantic Ocean under the ownership of the National Petroleum Authority and the Ghana National Petroleum Corporation.

Kern River Oil Field: The Kern River Oil Field is a large oil field in Kern County in the San Joaquin Valley of California, north-northeast of Bakersfield in the lower Sierra foothills.  Yielding a cumulative production of close to 2 Goilbbl of oil by the end of 2006, it is the third largest oil field in California, after the Midway-Sunset Oil Field and the Wilmington Oil Field, and the fifth largest in the United States.  Its estimated remaining reserves, as of the end of 2006, were around 476 Moilbbl , the second largest in the state.  It had 9,183 active wells, the second highest in the state.  The principal operator on the field is Chevron Corporation

Supporting paragraphs: Jubilee Oil Field National Petroleum Authority
Answer: National Petroleum Authority