The phrase "sole requirements" is correct and can be used in written English.
It refers to the only or single requirements needed for something. You can use it when discussing requirements or criteria for a specific situation or task. Example: The sole requirements for admission into the prestigious university are a high GPA and a strong letter of recommendation.
Therefore, diagnostic criteria should require abrupt onset of a primary CDH of long duration as the sole requirement for NDPH diagnosis [99].
"His sole requirement would be that he or she governs or interprets the law solely within the parameters of the U.S. Constitution".
Instead there is a vad, a self-elected group (the sole requirement for membership is showing up at monthly meetings) that collectively runs the organization.
The sole requirement that permits pass the test of sustainability turns out to include "economically sustainable", which can mean in receipt of government housing subsidy.
The availability of proper experimental datasets is not, however, the sole requirement for validating a CFD code.
Due to their wide range of substrates and the sole requirement of oxygen as the co-substrate, laccases appear to be a promising biocatalyst to enhance the biodegradation of micropollutants in wastewater in a complementary treatment step.
In this paper, over 50 years of experience with such devices is analysed and it is shown that, in the vast majority of circumstances, the sole requirement for biocompatibility in a medical device intended for long-term contact with the tissues of the human body is that the material shall do no harm to those tissues, achieved through chemical and biological inertness.
I think we can all agree: having a diploma isn't the sole requirement for any job.
Somebody is going to have to fix America's trade mess -- the key but not sole requirement for restoring American manufacturing to health.
