The phrase "a necessary qualification for" is correct and usable in written English.
It can be used when discussing requirements or criteria needed for a specific role, task, or situation.
Example: "A necessary qualification for this job is a degree in computer science."
Alternatives: "an essential requirement for" or "a vital criterion for".
(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.
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".
In her book on heroism, "Heroes, Saviors, Traitors, and Supermen: A History of Hero Worship," Lucy Hughes-Hallett argues: "Virtue is not a necessary qualification for hero status; a hero is not a role model.
Relatively humble origins had nevertheless become a necessary qualification for leading the Tory party: he was succeeded by Margaret Thatcher, John Major, William Hague, Iain Duncan Smith and Michael Howard, none of whom had been born with a silver spoon in his or her mouth.
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.
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.
The Rev. Dr. Alida Ward of the Greenfield Hill Congregational Church in Fairfield, Conn., takes the latter view: "If, as is clearly the case here, the preacher can no longer hold on to his/her faith, then, yes, the most fundamental and necessary qualification for this 'job' has disappeared".
The large number of hydroxyl groups in SBA-15 provides it necessary qualification for the modification of inner face and self-assembly of huge guest molecules, namely, providing outstanding hosts for self-aggregation chemistry.
