The phrase "a requirement whether" is correct and usable in written English.
It can be used when discussing conditions or criteria that must be met, often in legal or formal contexts.
Example: "The contract includes a requirement whether the services will be delivered on time."
Alternatives: "a condition if" or "a stipulation whether".
For discussion of precise versions of such a requirement, and whether they succeed in eliminating unwanted singularities, see Earman (1995, chapter 2).
Though there may now be a convention that parliament is consulted ahead of military action, it is not a legal requirement – whether or not the potential targets are UK citizens.
"The ability to buffer and store renewable energy is a fundamental requirement, whether it's wind or solar," he explained.
Extensive molecular analysis of each VDPV isolate is a requirement to determine whether it arose as a cVDPV or iVDPV.
On the other hand, there is a requirement to understand whether other socioeconomic factors studied in the general population can also affect the risk for readmission in the specific population of elderly patients with HF or AMI.
A number of reports have demonstrated that BMP4 can drive ESCs down a trophoblast lineage (35 – 39) across a number of species but the question remains as to whether a requirement for BMP4 is specific to differentiation of ESCs or whether it is a physiologically relevant factor regulating differentiation of committed primary trophoblast in vivo.
The standards include a requirement that consultants disclose whether any bank has "substantively reviewed or commented" on reports that the consultants submit to regulators.
Three appellate courts have split sharply on whether a requirement that most individuals obtain health insurance in 2014 or pay a penalty lies within the powers of Congress to regulate interstate commerce.
The crucial issue is whether a requirement that almost everyone obtain health insurance in 2014 or pay a penalty can be imposed by Congress under the powers granted to it by the Constitution, especially the power to regulate interstate commerce.
The ECJ was asked to advise on whether a requirement not to wear an Islamic headscarf when providing IT consultancy services could be regarded as a "genuine and determining occupational requirement", therefore falling outside the scope of the prohibition on discrimination on the grounds of religion or belief provided for by a EU directive.
