The phrase "a contract under which" is correct and usable in written English.
It can be used when referring to the terms or conditions of a specific contract that governs a particular agreement or relationship.
Example: "The parties entered into a contract under which the supplier agreed to deliver goods on a monthly basis."
Alternatives: "an agreement in which" or "a deal that stipulates".
The agency has a contract under which it could buy 900 of the scanners.
In 1913, the British government maneuvered its way to a contract under which all Iranian oil became its property.
(In the early 1970s, Mr. Asher devised a contract under which he was paid fees for his labor and materials instead of for the work itself).
Unknown to Ms. Li, it has a contract, under which the agent gets a $1,000 commission for each undergraduate it sends.
Rhode Island has already approved a contract under which Deepwater would sell the electricity for a price that begins at 24 cents a kilowatt-hour and rises by 3 percent each year.
After five months of arguments, state utility regulators have approved a contract under which a utility, National Grid, will buy half the output of Cape Wind, which if built would be the nation's first offshore wind farm.
No sooner did the first gas reach Lima than the government of Alejandro Toledo signed a further contract under which a consortium led by Hunt Oil, an American firm, would build a $4 billion liquefied-natural-gas terminal at Pampa Melchorita, south of Lima, for export to Mexico.
To end the street blockades in El Alto which cut off the airport the government made a different concession: it said that it would scrap an unpopular contract under which a French group supplies water to the city.
There cAccordingappy ending, butolike Nicholas, Bill, George and others, are having a hard time figuring it out.
Unlike that agreement, which included production-sharing rights, the new one is a service contract, under which China would be paid for its work at the Ahdab oil field southeast of Baghdad but would not be a partner in the profits.
Well-financed anti-labor groups related to America's radical right are coming to the aid of giant Fresno, Calif.-based Gerawan Farming to avoid implementing a union contract under which it already owes millions of dollars to thousands of its grape and tree fruit workers.
