HA!!
I now know what you are referring to!!
This shows how old we are.
I want to say, 16 years ago, there used to be a model aiprlane organization, not the AMA, that had this requriement for gas motors
SO i would set up a ZENOAH G38 with a switch on the fuslelage side, that would allow me to kill the motor in the case of emergencey.
Was it called IMAA??
LOL!!
long time ago
IMAA went away, dissolved.