Oh no! Not the IMC/IFR schoolboy error, at my age too, and on a public forum. Doh! You are of course quite right again, Whopity.
All this stemmed from a discussion about Standards Document 10 Air Law question 11 which I now see I mis-read and erroneously drew a conclusion from that is not there.
Thanks again Whopity for so clearly outlining some basic principles. Your air law is unnervingly good!
GGT