You may remember that I wrote in May about the City of Los Angeles' cellular telephone tax increase being illegal. One of the arguments that the carriers are making is very similar: a popular vote is required under Missouri law for a new tax to be approved. Cities are arguing that the tax isn't new. Legislation was passed capping the cell phone tax, but it was ruled unconstitutional by the Missouri Supreme Court.
The carriers could owe as much as $500 million, including interest and penalties. One thing is certain, though. If the tax ends up being owed, the bill will be passed on to consumers. That's the nature of all taxes.