Can I access AuthnContextClassRef in a flow decision state?

[Jim Fox]

I have an authn flow whose bean description specifies supportedPrincipals 
of PasswordProtectedTransport, Password, and unspecified.  When a request 
arrives asking for AuthnContextClassRef=TimeSyncToken this flow still gets 
run.  Is there a way in the flow description decision states to access the 
request's AuthnContextClassRef?  So I can pass on these requests.

Jim