The phrase "a main requirement" is correct and usable in written English.
It can be used when discussing essential criteria or conditions that must be met in a particular context, such as a job description or project guidelines.
Example: "To apply for this position, a main requirement is that candidates must have at least five years of relevant experience."
Alternatives: "a primary requirement" or "a key requirement".
A main requirement for a halftime performer at the Super Bowl is indestructibility.
Induction motors appear to be the choice for battery E.V.'s where high performance is a main requirement, Professor Hofmann said.
A main requirement, he concluded, was that workers throughout such an area would be sufficiently inclined to move jobs to even out regional booms and slumps.
This improvement can be associated with the extended inquiry project which is a main requirement in biology.
Accordingly high lipid productivity which is a main requirement for commercial production of microalgal oil-derived biodiesel was achieved (Sharma et al. [2012]).
A main requirement of any CDMA detector is the following: the detector needs to know the spreading codes of the users,.
To get a job as a patent examiner at a patent office, the main requirement is a scientific background, as patent offices usually provide patent-related training through in-house courses and mentorship.
Assuming that the sediment layer can be treated as a fluid, the main requirement is for the sediment substrate impedance ratio (evaluated at grazing incidence) to be less than −1, and very high reflection loss is shown to arise when this condition is only just met.
And just in case, there was also a qualifier of the main requirement: "Not yet wealthy but well-off also considered".
However, effective faculty development has as main requirement a good recognition of contents and methods for professional learning (Grover, K. S. Walters. S. R. C, 2016), something that Digital Scholarship could not be able of providing at its current state of advancement.
A university degree is the main requirement for teaching in Korea and Japan: A burning passion for Korean or Japanese culture is not a prerequisite for enjoying a year or two of teaching there.
