The phrase "a plan requires" is correct and usable in written English.
You can use it when discussing the necessary components or conditions needed to create or implement a plan.
Example: "A successful project is not just about the idea; a plan requires careful consideration of resources and timelines."
Alternatives: "a plan needs" or "a plan demands".
"Such a plan requires cutting, taxing and spending.
Such a plan requires courage and energy, and he had both in large supply.
Such a plan requires the reassignment of thousands of workers, not to mention shutting down and opening new offices across the city.
Under federal bankruptcy law, approval of such a plan requires the support of more than 51percentt of the number of creditors voting and more than two-thirds of the dollar value of those bonds.
One of the most important things I have learnt in Government is this: in a fluid, fast-moving global economic environment, sticking to a plan requires government to be flexible, as well as resolute.
The design and implementation of such a plan requires the collection and analysis of pertinent data.
But we will no longer adhere to a plan requiring a fixed number of shuttle flights.
Mr. Curry read the quotation from the lectern and said, "The governor finds it politically embarrassing to offer a plan required of him by law".
The judge, Jan E. DuBois of Federal District Court, ruled that the State Department of Transportation improperly shelved a plan requiring tougher vehicle emission inspections in the city and four suburban counties.
To speed the process, they devised a plan, requiring the most promising candidates to slip on an uncompromisingly skinny black dress that exposed every wayward bump or curve.
He announced a plan to push worldwide decision-making at the company down to the local level -- a plan requiring the layoff of 6,000 workers, including nearly half of those at Coke headquarters in Atlanta.
