The phrase 'when it is decided' is correct and usable in written English.
You can use it when you need to refer to a decision that has yet to be made. For example: "We will start planning the party when it is decided when the meeting will take place."
When it is decided to commence BTcP therapy and whenever its therapy is changed, special attention must be paid to clearly and sufficiently training patient and family member/caregiver.
The worst blow comes when it is decided, for reasons that are never explained to Alice, that her mother and little brother will return to London without her, and that she will be left at Ballydavid indefinitely.
Dyke told Press Association Sport: "The truth is, the chances of the 2026 World Cup being in Europe are virtually nil; Sepp Blatter has still got a good chance of being there when it is decided and we certainly won't bid if Blatter is there.
By G. F. T. Ryall The New Yorker, June 9 , 1956 P. 94Writer gives favorable description of Hollywood Park in California, and suggests that when it is decided where the new Long Island race track will be the Greater New York Association send its best man to Hollywood Park to talk to Jim Stewart who runs the works there.
"I have read Joachim Low is one manager we would like but it is always rumour and we will have the rumours until the next five months when it is decided whether definitely Ancelotti will be here".
The struggle for control of Aleppo's main prison, on the north-eastern outskirts of the city, has turned into one of those symbolic battles which will be seen as a bellwether when it is decided.
This happens when IT is deciding to do something, rather than being asked by the business to do something.
Anderson-Emmons joined the show in its second season, when it was decided to age Lily up a bit so she could start having some speaking lines.
The defense bar celebrated Batson when it was decided.
"We conclude... Bowers was not correct when it was decided and it is not correct today," Justice Anthony Kennedy wrote.
DT: The coalition building begins — I believe — when it's decided who wins.
