I don't know what you mean by "get recorded": Huh? Whoever did the
measurement for their purposes writes it down in their records. WTF
is "recorded" here?


State/County record each property's footage, I suppose. At least in MD, you
can go to
http://sdatcert3.resiusa.org/rp_rewrite/

and get any property's footage, lot size, accessed value and sale history by
select an county name and plug in an address or a street name.

Now interesting thing is that square footage number usually are not
accurate.
In my case, the county record office probably used the original blue prints
of
the house plan, omiting the customized part (an addition of an extra room)
and
and has that recorded in their database. I don't think an accessor ever
visited
my house.

So there may be an ANSI standard. But nobody follows that here.