A little bit of effort to go to the BSIS site will tell you what is needed to install burglar alarms.
You need either a C10 or a C7 contractors license in order to take the test and get an Alarm Company Operators License, and, the Alarm Company Qualified Managers license (ACQ). The test you take is actually the ACQ test.
So the deal is that you can't just be some guy walking down the street, or even worse, an ADT salesperson, who thinks it might be a good idea to get an ACO (alarm company operator) and an ACQ (Alarm company qualified managers license). You actually have to have a valid electrical contractors license either in "high voltage" which is C10 -- but pretty much covers everything, OR, low voltage + communication, which is the C7.
To install Fire Alarm Systems (not sprinkler), you need a C10. C10's often install 110vac Fire Alarm systems. But they can also install 24vac Fire Alarm Systems. In CA, there is a lot of pressure to have Fire Alarm installers/contractors also have a CA Fire and Life Safety Certification --- which is being lobbied hard by the unions. To get the certification you have to have X amount of hours of installation and go through an "apprentice" program --- which has a few options to it. It is a long and tedious process.
I have designed and sold a lot of commercial fire alarm systems. But nowadays, I hand that off to another C10 that I often work with because he has 30+ years experience doing it, and frankly, I have better things to do ( note: when my pal gets the fire job, he hires me to work with him, so it's a win/win).
On the other hand, I have installed quite a few residential fire systems that are part of the residential security system. The rules are not as strict here, and, there is rarely an inspection by the AHJ. The exception being if you are monitoring a residential sprinkler system.
Hopefully that answers the question. I have sent my ACO and ACQ study materials out to numerous folks who are hoping to take the test and pass it.
As a rule, those with little or no background in installing burglar alarms, CCTV, access, etc. usually don't pass the test. Those that don't understand basic electrical fundamentals, low voltage circuitry and terminology also don't pass the test. I also find that those folks looking for easy answers or have someone else tell them the answers that ONLY research, studying and experience teach you rarely pass.