I used to be a Professional Engineer but have retired. There is no test to renew your license. All that you have to do is pay the State $150 every two years and complete 30 hours of continuing education every two years. And that requirement is absurd.  More than once I completed my 30 hour requirement in one day by sitting at my computer and taking online "courses".  There is no reasonable explanation for Mr. Larson allowing his license to lapse 3 times, in particular when you factor in that his employer probably would have paid all of the fees involved.