The phrase "a declaration whether" is correct and usable in written English.
It can be used when indicating a statement or announcement that clarifies a choice or condition regarding a particular matter.
Example: "The committee issued a declaration whether the project would proceed as planned or be postponed."
Alternatives: "a statement on whether" or "an announcement regarding whether".
We never push them to articulate a principle that would inform these important decisions, and we fail to press for even a declaration of whether the pardon power should be used at all.
"No one in Europe is going to accept a declaration of independence, whether it be deferred, delayed or in phases," said Inés Arrimadas, a leader of the Citizens Party, who gave the first response to Puigdemont's speech in the Catalan parliament Tuesday evening.
Since 2005, horses are required by law to have a "passport" that contains a declaration as to whether the horse is intended for human consumption.
Trump said Wednesday that his "threshold" for such a declaration is whether he and Congress are able to strike a deal on wall funding.
The unanimous vote on Tuesday amounted to a declaration of doubt about whether the performance and pledges to improve service warranted renewals.
Capping months of negotiations and years of consumer complaints, the board's vote amounted to a declaration of doubt about whether the company's past performance and its pledges for the future warranted renewals.
More broadly, the practice of journal-based evaluation has become deeply institutionalised, and it remains to be seen whether a declaration like this will be enough to change behaviour.
Judge S. James Otero ordered them to file a declaration from Cohen himself, stating whether he intended to assert his constitutional right against self-incrimination.
You can read this passage several times without figuring out whether it constitutes a declaration of the sublimest contentment, given that Jakob's fantasy of wealth is identical to the reality of his poverty, or whether Walser is saying something else — that only a rich man could enjoy the simple life, since only then would simplicity be his free choice.
The October 2018 regulations note that the "safe harbor" is not available for pilot program covered transactions for which CFIUS completes all action on the basis of a declaration, irrespective of whether the transaction could result in foreign control of a US business.
