Text in force at CS27-10: from CS27-0, effective 14 Nov 2003.
(a) There must be means to quickly shut off all ignition by the grouping of switches or by a master ignition control.
(b) Each group of ignition switches, except ignition switches for turbine engines for which continuous ignition is not required, and each master ignition control must have a means to prevent its inadvertent operation.
ED Decision 2003/015/RM · Source