The way it used to work here in Austin is if the police get called out, either by the alarm directly or the alarm company, you get charged a fee whether it's a false alarm or not. With a permit you don't get charged. I know some of the Texas laws have been changed, for example you can't just go to Home Depot anymore and buy alarm components and install it yourself; it must be done by a licensed installer. I'm not sure about permitting, but it's probably up to your municipality.