Florida used to have a law against blasting loud music from a motor vehicle. It has now failed a Constitutional challenge:
A Florida law prohibiting the blasting of loud music from automobiles violates the first amendment, the Florida Court of Appeals, Fifth District, ruled on September 16. Shannon Montgomery had been driving in Marion County with his tunes “plainly audible” from a distance of twenty-five feet, contrary to the statute. He was pulled over and police eventually discovered he was carrying cocaine and marijuana.
Montgomery moved to suppress the evidence against him, arguing state law used to justify the traffic stop was overly broad and that “plainly audible” is an arbitrary standard.
Where Florida failed, apparently, was in its effort to fine-tune the law:
In 1998, the appellate court first ruled that a law prohibiting plainly audible music from 100 feet was not vague. In 2005, the legislature responded by reducing the distance to 25 feet… the legislature also added an exemption for amplified business and political speech, which doomed the law in the court’s view. The judges found that this provision inverted the proper constitutional principle that non-commercial speech be given greater protection than advertising.
Whether this means that “political speech” qualifies as “advertising” it’s certainly invoiced as such I leave to someone with a more thorough grounding in the law.