The rule is - if it's going inside the wall, only a licenced electrician can do it. Yes it also extends to things like speaker or HDMI cables. It's mad.
I can understand requiring a license for any power wires behind walls.
I could also see the possibility that it's just an old law that doesn't consider data-only cables which don't have the safety issues that wires carrying power do.
Yeah, it's all fun and games until you're at Macca's and someone says, "Oi, can you pass me a chippy?" and they get real confused when you go find a carpenter.
in Spain we call them
“chispas”, which literally means sparks. An electrician is someone who knows the home electrical wiring stuff, while a chispas is someone who is skilled in repairing home appliances.
When I moved into a new house in Australia I asked the real estate agent if I could extend the fence, and he said I'd need a cheapie to do that.
I said ok but scratched my head as to why it needs to be cheap, only to find out later what he actually said was chippy, slang for a carpenter.