Officially, NY 24 westbound uses 212 St, not Hollis Court Blvd.
Cite?
https://www.dot.ny.gov/divisions/operating/oom/transportation-systems/repository/tour_route.pdfNY 24
(NY 25) Queens, on Hollis Court Boulevard and 2l2th Street, Jamaica
Avenue, Hempstead Avenue, east to New York City - Nassau County
Line, east on Hempstead Turnpike to East Meadow, Levittown,
Farmingdale, East Farmingdale (NY 110)
That said, fair point that other official sources disagree. And there are no signs to resolve this, so... I dunno, pick one. It being a one-way pair is more logical and tidier, I'd say, and current third-party mapmakers seem to agree.
Poking around a little more... a random sample of older third-party paper maps (drawn from my own collection) consistently show a one way pair on 212th St... and 212th Pl. One of the three maps I pulled pre-dates the Clearview Expressway's construction, but the other two I pulled post-date it, so there isn't an immediate change to align with the Expressway
I also peeked at Historic Aerials, and the permanent U-turn preventing northbound traffic on Hollis Court from accessing Hillside Ave was installed sometime between 1985 and 1994. Prior to that, it went through. This seems to roughly align with when third party maps start showing Hollis Court Blvd instead of 212th Pl as the eastbound routing, though that may be coincidental.
The question I don't have the answer to is... what was signed before signs were removed. Though for what it's worth,
this assembly of old, decaying signs that looks like the sort you'd expect to see on official route and not some random side street survives at the north end of 212th St. So that may be a hint.