Check 16 (2):
does not include an aircraft operated solely between
places in another state
And that is the clincher.
This is what a lot of us have been saying. So, for example, if we operate HNN to TFS, we are not due to pay taxes to fund the Irish Miracle.
I am happy to pay tax in my own country, subject to normal practice, such as tax code allowance etc.
I am
not happy to pay national insurance as employer of myself, and will not put up with it much longer, whatever the "contract" says. I am half tempted to bugger off to the sandpit, but anyone who knows me will realise I am bloody minded enough to stay here and dig my

heels in and make it right. Because it is FUBAR!
There...