In the NYT on 9/11, an editorial “An Amendment to Cut Political Cash”, with the now-familiar retronym natural person:
There are 48 Democratic senators sponsoring a constitutional amendment to restore congressional control to campaign spending that is expected to come up for a vote later this week. They are not under the illusion that it will become the 28th Amendment soon, if ever. But their willingness to undertake a long and difficult effort shows the importance they attach to restoring fairness to American politics by reducing the influence of big money.
… Addressing the Citizens United decision, [the amendment] says that governments can “distinguish between natural persons and corporations” in setting those regulations, thus allowing restrictions on corporate or union spending that would not necessarily apply to individuals.
Ordinary people would simply make a distinction between persons and corporations, but once corporations are treated as persons for certain legal purposes, the ‘human being’ sense of person needs to be distinguished from these legal entities — and so we get the retronym natural person ‘human being’.