Apex
Somewhere Around Nothing
As some people already pointed out, this is not very realistic (at least in the US). If ensuring someones ID picture is as accurate as possible really were a priority here you would not be able to go years (sometimes a decade or more) with out ever getting a new picture taken. I had my learners permit picture (15 years old) all the way till I was 25.I don't think it's reasonable to allow any kind of headgear on a photo ID. Headgear can dramatically change the appearance and can be used as a disguise. The photo ID needs to present a baseline appearance for comparison.