NIMBUS
You don't seem to be getting the point - it makes no difference in the'open' FIR if you have an IMC or IR - it is NOT controlled airspace. Correct me if I'm wrong but in the USA most airspace above 1200' AGL is effectivley Class E ie IFR flight is only allowed with ATC permmission and control. Thats a great way to work if the ATC services are funded by the taxpayer and not by user charges as ours are.