Hey Jon,..here is the link I found with the Yahoo search engine. The info. I posted earlier today. I know it say's the IMAA Safety Code but it also says in conjunction with the AMA and vise-versa. I'm not trying to open a can of worms here,....just info. to pass on.

I will be using a seperate switch,..etc... if weight allows.
[PDF] IMAA SAFETY CODE
23k - Adobe PDF - View as html
SECTION 5.0: EMERGENCY ENGINE SHUT OFF (Kill Switch) ... 7.2 The Academy of Model Aeronautics, in conjunction with IMAA has developed an Experimental ...
http://www.piedmontaeromodelers.com/...safteycode.pdf
Regards,
Bill Holsten