The phrase "the deadline when" is correct and usable in written English.
You can use it when referring to a specific deadline or timeline. For example, "The deadline when the project must be completed is Friday."
That is the deadline when gun owners must be in compliance with the county's Handgun Record-Keeping Accountability Act.
She said: "Hopefully this will add momentum for governments to act – 2015 is the deadline when all governments must be ready to commit internationally.
Noting that previous agreements over the budget had come together around the deadline when the country has reached its statutory borrowing limit, Mr. Ryan said, "We think that will be the forcing mechanism to bring the two parties together.
The commission had established the deadline when it set out to decide how to regulate trading by American banks in London and beyond — a chief factor in the 2008 financial crisis.
Pensions There's less than a fortnight to go until the deadline when firms with five employees or more will have to offer employees access to a stakeholder pension scheme.
But it seemed unlikely that foreign experts could join the operation before midday Saturday, and that is a day beyond the deadline when the crew is likely to be out of breathable air, according to the estimate made by the commander of the Russian Navy, Adm. Vladimir Kuroyedov.
But the move now sets up an uncertain 72 hours as the Congress moves ever closer to the Tuesday deadline when the Treasury Department says the country will default on its financial obligations without an increase in the debt ceiling.
If Mazzilli was to blame for the collapse, who was to blame for making no significant moves before the trading deadline, when the Orioles were in the midst of their collapse?
The Knicks will be one of the first teams to deal with the effects of the trade deadline when they visit the Chicago Bulls on Wednesday.
Within the borrowing deadline, when the total bid exceeds the borrowing amount, lower interest rates triumph.
NEW YORK TIMES Volcker Rule Could Miss Deadline, Bernanke Says | Ben S. Bernanke said he did not think the Volcker Rule would be ready by the July deadline, when the restriction is set to take effect with a two-year transition period, Bloomberg News reports.
