I am an active appraiser, just not a licensed anymore. I let my license expire two years ago and tried to retire but the local courts keep making me offers I can't refuse. They continue to appoint me (I don't need a license to be appointed) and the local judges don't care much about USPAP, they've essentially said so in several trials in which I've testified. They've seen too many landowner-biased appraisal reports, often completed by MAI hired guns/prostitutes hired by the landowner's attorneys, that purport to follow USPAP so they, and the juries, are more interested in credibility and competence.
So, as a non-licensed appraiser, I don't really care much about FAQ's or AO's and don't keep USPAP on the pedestal where I was once required to keep it.
But to the question at hand...I know that USPAP and its FAQ/AO offspring allow an appraisal of a segment without using a HC, the question is does it prohibit it? I don't think so. I'm thinking it simply allows an appraiser to complete a report for the secondary market (the real boss of USPAP) without using a HC.