That is true, we didn’t have to start using four digits on most everything until 2000.
I meant to refer to automated documents only, not hand-prepared documents. By automated I mean documents that likely started out as 80-col cards files or 80-column card-image tape/disk files.
It is common to change field formats as hardware, time, and money permitted or need dictated. Perhaps Hawaii actually did modify the registration number by expanding YY to YYYY during Y2K corrections. They'd have to if applications needed to sort on year -- though utility sorts could recognize 19YY and 20YY in YY format, IBM MVS for example.
So a Hawaiian government computer generated COLB could maybe have the YYYY format in the registration number.
Boy! if only President Obama would deign to do as us little-people American citizens do millions of times almost daily.. release ^%&## long form b.c.
All we are saying
is give release a chance.