GothicAngel -- if you think it's municipal, start with the town's by-law officer and sometimes the by-laws are available on the town's website. If you can't find anything there, go to the next level of government - provincial or state. Call up the police detachment or transportation office and see what they have to say about it.
Yup, there are lots of times that the law enforcement officers don't have the backup for supposed "law-breaker arrests." I've asked them tons of times to tell me what law, act or regulation they are enforcing and most of the time they can't tell me. Never assume something is so just because someone with a uniform says it is.