Mainframe...
The US FAR's are fairly well thought out and not subject to frequent amendment because they probably have got it right by now.
There is probably another reason for that. Last I heard, which isn't all that long ago, the FARs are in a tangle that is proving extremely difficult to sort out. It's been suggested to me that the FAA would love to rewrite the FARs, but it's a matter of knowing where to start because the Regs are so convoluted.
I haven't been able to confirm any of this so it could be wrong, but the FARs comprise a rather massive document. I reckon the lawyers love it!
