City Licences are all you need in larger citys. In my Case Mason City "Sponsored" me I had to prove 4 years experience as an Apprentice before I could take my Journeymans test. I also took 3 years of an apprentiship program at the local community college. Same deal for my masters, I had to fill out another application to the mason city electrical inspector to take that test. Experior test. They are out of Florida.
Now If I'm ever working in another city in Iowa that requires Licencing all i need to do is go down to the city hall and show them my licence. Pay the Dues usually $20 or $25 and then I'm good for that City for that year. ONLY the larger citys require this. Small towns and rural areas will let any idiot with a roll of romex do what whatever he wants. Occasionally the insurance companies will make people change things. Or the Bank somehow requires a certain service size before approving a loan for buying a house.
It's Not The Fall That Kills You...
It's That Sudden Stop At The End