The phrase "a requirement in a" is correct and usable in written English.
It can be used when discussing a specific condition or necessity within a particular context or framework.
Example: "Meeting the deadline is a requirement in a successful project management strategy."
Alternatives: "a necessity in a" or "a condition in a".
SENATOR JOHN KERRY, fulfilling a requirement in a new election law that presidential candidates pledge responsibility for their own ads.
The North Carolina Supreme Court applied such a requirement in a case concerning a 2003 redistricting plan for the state legislature.
Mr. Mica, the chairman of the House Transportation Subcommittee on Aviation, is proposing such a requirement in a bill on aviation safety.
Yemen's Parliament approved immunity on Saturday to free President Ali Abdullah Saleh from prosecution, following through on a requirement in a deal for him to give up power.
It's a requirement, in a sense, because it means when you're mid-mission you have to keep going: there is a definite urgency here.
The ability to predict failure loads in composite structures containing through-the-thickness cracks is a requirement in a variety of structural design circumstances.
All television anchors are egomaniacs: it's a requirement in an impossibly difficult job in which any live remark can be a career-shattering land mine.
Packages are a requirement in an environment where models are likely to be imported from external sources, such as vendors or standard bodies.
The committee found no evidence that medical professionals who perform abortions require hospital privileges to ensure a safe outcome — a requirement in place in 11 states.
BUYING BASICS A notary public is a requirement in property sales; a lawyer is optional but strongly recommended.
Much of the discussion has also focused on whether insurers should be forced to cover anyone who applies, which is a requirement in only a handful of states.
