Ah, seeing the rest of the thread and -07 I get your comments now. I agree, this I-D a) must not provide a way to use ECC PKIX certs without providing a way to use PKIX certs generally, and if past efforts are any guide, that will take some effort, b) must not require use of ECC certs (but if (a) is met the (b) is implied. Sorry.
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