They had state licenses then they had city & county certificates of competency. Most small contractors don't travel far from home so they could get a license like that, it's the same deal with the exams and financial responsibility BUT there were a ton more categories. A fence guy could get a license to install fence only, same with signs and a lot of other trades. The good side of it is that they eliminated the need for licensing in some categories that were just stupid like painting, flooring, cabinets etc as long as it doesn't require a permit. If it does, then you have to be a GC. The problem is, they kept the licensing requirements for certain trades like non-electrical signs but threw it into general and building contracting. As far as I know, that means that any installation of a sign would require a GC license even if it does not require a permit or you'd be considered an unlicensed contractor which is a $10k fine down here.