eyeinthesky,
An IFR flight can land at and depart from a farm strip. It must be visual from MSA since ther are no instrument procedures. There is no cleared and graded area. If the farmer installs and ILS he must have a cleared and graded area......even if the pilots flying the ILS are visual.
I was using the CAT 3/CAT 1 idea to explain the principle using totally different and unrelated circumstances.
Regards,
DFC