Text in force at CS23-6: from CS23-5, effective 15 Aug 2017.
(a) The installed powerplant must operate without any hazardous characteristics during normal and emergency operation within the range of operation limitations for the aeroplane and powerplant installation.
(b) The design must allow the shutdown and restart of the powerplant in flight within an established operating envelope.
ED Decision 2017/013/R · Source