The nurses did not have any issues as they are licensed by the state(s).
The problem is medics in CA are licensed by counties that all have their hands in the cookie jar, and a bunch of hostilities among agencies for whatever reason. For a while there it was that bordering medics had to have ICEMA, then we didn’t, then we did, now we didn’t again... Then they didn’t want you going outside of their ICEMA scope despite being trained at a higher standard. That brought a lot of BS with fire department personnel and other EMS or law enforcement personnel “snitching.” They’d literally call the EMS agency and taddle that they saw the medic touching the pump/doing a chest tube/et cetera.
It caused a lot of headaches, but as of the last few years I didn’t notice much of that BS. I ran a lot of calls in Baker, Death Valley, Dumont Dunes, etc and I never had an issue except for once. Generally, the medical director will have your back, as I mentioned before. The EMS agencies and ICEMA office have their own medical directors. That said, most of the physicians know each other and usually can squash whatever issues arise.