The phrase "a necessary qualification" is correct and usable in written English.
It can be used when discussing requirements or criteria that must be met for a particular role, task, or situation.
Example: "To apply for the position, a necessary qualification is a degree in computer science."
Alternatives: "an essential requirement" or "a vital credential".
(Mastery of stale metaphors appears to be a necessary qualification for Wall Street analysts).
Then competence in a foreign language could be made a necessary qualification for higher education – all higher education, with no ifs or buts.
He had been told this was a necessary qualification to become a research biochemist, which was still his ambition, but he learned to love the profession for itself.
For me, a PhD is a necessary qualification for the academic career I want, so they agreed it would be better for me to get on with it rather than getting a job and doing my PhD part time.
Urging the justices not to hear the case, Joyce E. Peters, the chief disciplinary official for the District of Columbia bar, said, "Character is unquestionably a necessary qualification for membership in the bar".
Kildea's taste in music could be improved on, notably preferring that dull and mechanical Nocturne to the great Serenade for Tenor, Horn and Strings; but perhaps a certain restriction in taste is a necessary qualification in this field.
Such a government lacks the necessary qualification to lead an international movement against terrorism.
These years in the provincial press were the necessary qualification then for a place on a national newspaper, and in 1963 he moved across the Midlands to Birmingham as one of the two incumbents of the Guardian's regional office, alongside Roger Silver, who became one of his closest friends.
Rather than being a barrier, incarceration history is a necessary job qualification and asset in the TCN, thus recasting the typical stigma, shame, and inability to meet daily needs associated with having a history of incarceration (Harris 2006).
The Project should assess the number of teachers and supervisors lacking the necessary qualification and training, and offer a special course.
Previously, the role of Karta was restricted to the eldest male in the family because a 1956 Indian law said female family members "did not possess the necessary qualification of co-parcenership," or the shared ownership of an inherited property, the Dec. 22 judgment noted.
