Thanks to a tip from my state certifier, I've discovered a new and very nicely written “policy on adjustments to certified courses”.
For better or worse, the policy leaves a lot to certifier/measurer discretion, i.e., it does not clarify exactly how much “adjustment” , or where, is to be considered acceptable in lieu of making a new course.
The policy can be found here: http://www.usatf.org/events/co...tion/adjustments.asp