There's no right to drive a car.
ICAO is not a "UN" organization. Nor does it have anything to do with the Oklahoma drivers license process.
Yes it is, actually. It is right on the front page.
http://www.icao.int/Pages/default.aspx
Whether it has anything to do with the OK driver's license process, I don't know. I wouldn't rule out that ICAO accesses such databases for known or suspected terrorists or for aiding Interpol, etc.