There can be a fine line on camera installation and/or cabling. If for example I go to do computer cabling work in Mass. No license is required for communications and I install cat5 jacks everywhere the customer wants them and terminate them to a patch panel. Once tested and labeled I'm done.
What the customer plugs into these jacks does not require a license either. So the customer then can plug in baluns at each end and plug in cameras, or plug in IP cameras. I don't believe any codes would be violated.