A small report so turns out I was the first overseas applicant and they turned me away due to the fact my HKID is not a permanent one. As of my application time over a year ago I explicitly remember it was only a valid HKID unless anyone has a screenshot of the old dragonair website application from like February of 2016. I would encourage all overseas applicants to double check with Cathay Dragon before progressing. I am currently emailing them back and forth to figure out the situation. I am lucky as I was already in hk but a warning to those who are coming specifically to do the test. Double check before you buy any tickets.