Can you point to a reg tht says that? I don't think it is true. Mine was
IFR certified when I bought it, and it did not have alternate static (I've
since added it). Also the FAA materials for the IFR written mention several
times that breaking the VSI glass is the way to get alternate static on an
airplane that doesn't have a valve. I wouldn't think they'd make such a big
deal about it if an alternate static source was requried for IFR cert.

The CO wrote:

IIRC in fact, for an aircraft to be certified for IFR it has to have an
alternate
static source *as well*.

--
--Ray Andraka, P.E.
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