In article , "SFM"
wrote:

The in flight controversy comes from section 4 of 91.171 which is
highlighted below. The only time the Dual Check is mentioned it is preceded
by 'While in flight'

No it isn't. The "while in flight" is in paragraph (b). The dual VOR
check is described in paragraph (c).

My question is then if that is the case then how does one check their VORs
when at an airport that does not have VOT or FAA approved VOR Check and
depart legal IFR?

If you are out of VOR currency, and there's no VOT or approved check
point, and you can't get a valid signal to do a dual VOR check (and
there's no radio shop on the field who could do the check for you), the
answer is simple (if somewhat inconvenient): you cannot depart IFR on a
flight which requires the use of your VOR receiver.

It no different than if you let your annual lapse, or your pitot static
check, or any of a number of time-limited certifications for either
yourself or the aircraft.

I think the reg is being read wrong by those in flight advocates and section
(c) is not subordinate to paragraph 4 but stands on its own.

Exactly. It's parallel to paragraph (b). There really should be some
questions on the private pilot written about how to parse the text of
federal regulations :-)