This tank and trailer assembly is transported on the public roadway at least once a week by several individuals. Approximately 15 to 30 miles round trip. It is my opinion that it is in the best interest for all parties involved and for the safety of the general public that this trailer assembly be removed from use. Not only for traffic and boating safety, but also for environmental safety of our waterways. This trailer has been in use since 2004 and thank God there hasn't been an incident.  I am looking for some support in my decision to remove this trailer from use i.e.: rules, regulations, law enforcement fines, ect. Your opinion is greatly appreciated and if you could refer me to other agencies that my have jurisdiction over these types of devices that would also be appreciated. There are several of these types of trailers in the neighborhood along with 100 gallon tanks that are loose in the back of pickup trucks. The tanks are passed from on truck to the other. This seems to be a  growing practice among boaters to save the 30 cents per gallon at local gas docks. I have been unable via the internet or  from my local police departments to find any rules or regulations for this type of fuel transportation and transfer. I'm sure that it will only be a matter of time before someone is seriously injured.