The phrase "except in case of" is correct and usable in written English.
You can use this phrase when you want to state an exception to a rule. Example: We must arrive before midnight, except in case of an emergency.
The monument's steps have been closed to visitors, except in case of emergencies, since the 1970s.
Except in case of Chinese, or other Asiatics, alienage is a condition, not a cause, of deportation.
As he has promised not to raise taxes except in case of an emergency, another man in Fresno wanted specifics.
Under Brazil's constitution, indigenous people cannot be forced off their lands except in case of war or epidemics.
This leaves enough time that we will not be able to grant extensions except in case of documented medical or other serious issues.
The rule is that the Court will not imply any condition in a contract except in case of absolute necessity: Hamlyn, v. Wood.
Mr. Shemyakin said he and his editorial board had decided not to cover the parliamentary elections, except in case of breaking news about a candidate.
The US constitution, borrowing from English common law, affirms that "the writ of habeas corpus shall not be suspended" except in case of rebellion or invasion.
On the other hand and de spite the imposing office in the east wing of City Hall, the Council President simply presides over the Council, taking part in debate but not voting except in case of a tie.
* * * He shall be the president of the council, and shall preside at all regular and special meetings thereof, but shall have no vote except in case of a tie.
Last year the law, which bans any "assault on the integrity of the human body except in case of therapeutic necessity," was changed to replace the word "therapeutic" with "medical".
