[Legislation & Standards In The Usa]

Does anybody know where to get some information about legislation and standards to meet for CCTV/Security System Installers?

I know that there are specific standards for Alarm Units, Services and Systems provided by UL (http://www.ul.com/) but I'm not US citizen and I would like to know a bit more about how things work there.

If anyone could put some light on this issue, I'd really appreciate it.

Thanks!