The phrase "as stringent a" is correct and usable in written English.
It is typically used to compare the strictness or severity of two different standards or conditions.
Example: "The new regulations are as stringent a requirement as the previous ones, ensuring compliance across the board."
Alternatives: "as strict a" or "as severe a".
Irving Howe, as stringent a critic as any, once described him as "enormously, even outrageously talented".
He put his students through as stringent a course as ever was offered in more normal times.
[n3] And New York [p764] concedes that only one other State -- Kentucky -- has imposed as stringent a primary registration deadline on persons with prior party affiliations.
Indeed, almost every episode could have been trimmed if Mr. Prince had been as stringent a dramaturge as he has been a scene shaper.
Though the appellate court suggested that it may be difficult for a trial court to find that a breakup of Microsoft is the most appropriate remedy, the Justice Department must continue insisting on as stringent a remedy as possible.
Although our analysis does not provide strong evidence for a relationship between variation in the Y chromosome and prostate cancer, it can be argued that the appropriate statistical threshold to be applied to a study of approximately 30 markers should not be as stringent as a GWAS threshold.
TPIMs (terrorism prevention and investigation measures), the coalition government's replacement for control orders, are as stringent as anything available in a western democracy.
This advertisement is for a graduate role, so the experience requirements are not as stringent as for more senior positions.
Controls on biological agents should be as stringent as those applied to critical nuclear materials.
He also insisted that Madison was never as stringent as Greenwich.
"Her demands of Sri Lanka were as stringent as her demands of England.
