The phrase "and explain when" is correct and usable in written English.
It can be used when asking someone to provide clarification or details about the timing of an event or action.
Example: "Please provide your feedback on the project and explain when you think we should implement the changes."
Alternatives: "and clarify the timing" or "and specify when".
They must either admit it was a lie and apologise to their voters, or justify it and explain when it is coming".
It "forces you to think in advance — both adviser and client — and put a plan in writing and explain, when you're tempted to take an action, how it fits into your plan".
(Change Britain, incidentally, ran into early difficulties after it quietly dropped one of the key pre-referendum pledges of its predecessor organisation Vote Leave: that Brexit could see an extra £350m a week spent on the NHS. Labour MPs instantly demanded the group "either admit it was a lie and apologise, or justify it and explain when it is coming").
We analyze the resulting planners, evaluate their performance, and explain when they do best.
I'm always very proud to stand in front of my constituents and explain when I have a difference of opinion with them," Wasserman Schultz told the South Florida Sun-Sentinel Friday.
We also demonstrate that paired screening trial bias may not affect the scientific conclusion, and explain when the scientific conclusion is likely to be correct.
The group's website discusses "obligatory" terrorism, and explains when it is justified to kill civilians.
So it was encouraging when President Obama invalidated the Bush signing statements last week and explained when he would issue statements of his own.
Cynthia Kent, by all appearances about the appropriateness of the death penalty in the case, and explained, when back on the record, that the surviving family wanted it".
Outside the chapel, several firefighters answered questions and explained when and how to sign up for the next department exam, which will probably be given early in the year.
Suzanne Johnson, the general manager, showed off a hideaway lounge with squashy armchairs, beverages and a television, and explained, "When husbands come, women buy fewer pairs, so we put them in here".
