The part of the sentence "is required within" is correct and usable in written English.
You can use this phrase in many different contexts to express the idea that something must be completed or done within a certain time frame. For example, you could say: "Attendance at all meetings is required within the first two weeks of the semester."
An examination by a "psychiatric commission" is required within 72 hours of the order, but staff from the same hospital usually make up the panel.
Interest rates on these plans, Ms. Ekmark said, are often zero, though repayment is required within a few years and down payments are often as high as 40 percent.
Prompt delivery is required within that short critical period.
£150,000 is required within the first year for this start up business.
Restoration of productivity is required within 10 years after soil replacement.
Obviously, the fundamental frequency of the information signal is required within the center frequency band of the chaotic signal.
For substances produced or imported in quantities of ≥ 1,000 metric tons/year, such data can be required within REACH, but this requirement can also be waived.
The financial statements are required within 40 days after a quarter ends, an S.E.C. spokesman, John Nester, said yesterday.
Over the next eight years, nearly half a million workers will be required within skilled construction trades, ranging from bricklayers to renewable energy geothermal pump installers.
If Mr. Janklow were to resign, Gov. Mike Rounds would be required within 10 days to call a special election to occur within 90 days, unless the vacancy arises within six months of a previously scheduled statewide election.
Judge Johnson's decision cited findings that in a third of its cases, the city took more than 30 days to provide emergency benefits that were required within 72 hours.
