Normative text in informative "Requirements" section

Hi all,

Re-reading the draft, I noticed the "Requirements" section (§3) is 
flagged as "informative".

But §3.2 contains bolded "should", "may" and "must" key words that 
reference RFC2119 and are normative.

We should probably flag §3.1 as informative and flag §3.2 as normative.

PS: Jo, btw, there remains an upper-cased "MAY" in §3.2.3.