Hmm, is the normative rule itself also obsolete? If so, we should remove it via a core issue; if not, we should replace this example by a correct one.

Updated 2015-03-05:
An example using NSDMI was been sent to the Core reflector. The normative rule still needs to be updated to replace "implicitly-declared" with "non-user-provided" (or perhaps "defaulted"). There is still no example where the violation stems from calling a base class constructor.

(Old content, still applies to base class constructor example):
I haven't discovered any case where the normative rule itself prevents anything that cannot be interpreted as a violation of the ODR (less the rule in question) or some other "ill-formed, no diagnostic required" rule having to do with templates. I will send a note on the Core reflector.

This is http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#2085

This issue is covered by CWG 2085.