[vonmoltke]

> are frequently reevaluated on it through examinations to keep their license.

Not in the US. Keeping your license, whether for medicine or engineering, is just a matter completing continuing education units. There are nearly worthless activities that count towards CE units, and I have yet to see any that are actually graded (they are all just butt-in-seat things).

People here seem to have anloftier view of licensure than it deserves. Sure, it's better than nothing. However, licensed != competent and should never be used as a substitute for measuring competence.