"period within which" is an accepted phrase in written English.
You can use it to refer to a period of time during which something occurs or is valid. For example: "We have a limited period within which to submit our application."
"No federal or state statute," he wrote, "prescribes a time period within which a supervisor must notify an applicant that her application is incomplete".
And the company, in a response to the government in 1999, said that the time period within which such valves should be closeable was one hour.
Work is progressing but the trust is looking at a 50-year time frame - the period within which the world's carbon dioxide emissions must be cut by 80% to prevent dangerous climate change.
You have the seven-day period within which to handle all of the counting of the votes, the initial counting, if you have an automatic recount and if there's going to be a manual recount.
The problem here is that the 19-year gap between the two trilogies – as Rogue One has been discovering – is a tough period within which to set a Star Wars film.
"There is a six-month period within which to remedy Senanayake's bowling action and we are making the maximum use of it," Sri Lanka's head of cricket operations, Carlton Bernardus, told ESPN Cricinfo.
There are usually time periods within which the board must act.
By providing discrete time periods within which to assign home and work locations, the temporal approach to classification also offers a second advantage, which is that it allows us to incorporate a measure of uncertainty into the assignment of home and work locations to each user.
In this study we determined the periods within which BMP4, Wnt3a and Activin A induced mesendoderm in differentiating mouse ESCs.
The three species all had significant synchrony of births, but differed in the breadth of the periods within which most births occurred (Fig. 4).
"That meeting resolved that all the states that had a backlog of unregistered births should define specific periods within which to clear the backlog," says UNICEF Nigeria Child Protection Specialist Maryam Enyiazu, who is managing the project.
