Normative diffs

[Harald Alvestrand]

FWIW, draft-ietf-ipr-3978-incoming-09 solved a similar problem by saying 
(section 2):

   Section 1 provides definitions used in these policies.  Sections 3
   and 4 of this document explain the rationale for these provisions.
   Sections 1, 2, 5 and 6 of this document are normative, the other
   sections are informative.

Amusingly, the most convoluted part of getting that right was that 
section 2 (which contains this statement) had to be normative in order 
for the statement about which sections were normative to be normative :-)

                     Harald