After a review of the D14 Enduro 2010 Supplemental Rules, the AMA has requested that we remove two rules that conflict with existing AMA rules:
Rule 2.b - Sound Limits. There was some conflict and redundancy with the AMA rule on sound limits (as well as some changes coming in 2011), so moving forward we will just defer to the AMA rule book for sound limits.
Rule 4.f.vi - 20% Rule for Working an Event. This conflicts with the rule found in Chapter 2, Section 2.3, item C-2 of the 2010 AMA Rule Book.
More Info:
http://www.d14enduro.org/rules.shtml