You cannot land with RVR less than 1800m regardless of met vis surely
Per FAA rules this is a wrong conclusion.
There is nothing in the FAA regs that prohibits IFR flying (or landing) in uncontrolled airspace. It may be stupid, reckless behaviour (depending on situation) but definitely not illegal. How JAA looks at it I can't say.
Another tip-off that (A) is a wrong choice is that they are using RVR in uncontrolled airspace, such combination makes no sense at all.