Yes, I guess the citrus police wouldn't want you to have a Poncirus. It
is a lovely plant, though.

The worst interaction I ever had with the plant police was a few years
back on my way into the Burning Man Festival in the barren high desert
of northern Nevada. We had two good-sized potted banana trees with us,
which were intended to sit out in front of our campsite and look
ornamental. The Federal Bureau of Land Management police are in charge
of those public lands, and they wanted to confiscate the banana plants
so that the banana seeds would not get loose and invasively naturalize,
making a banana jungle on the high, waterless alkali flats. My daughter
tried with all her might to convince them that if seeds could ever
sprout there, there would already be a dense marijuana plant cover. We
finally managed to keep the banana plants through some fast talking and
complex phone calls to officials and paperwork that was entirely bogus...

No plants at all grow on the Black Rock Desert, no bananas, no
marijuana, not even Poncirus.