E-ZPass tag requirements vary with the state and agency issuing them. In NY for instance, tags issued by the NY/NJ Port Authority have a $1 per month account fee, but those issued by the Triborough Bridge and Tunnel Authority have no monthly fee. The NY Thruway Authority also has a special E-ZPass plan for RV's that discounts tolls for 5'vrs, and only charges motorhomes the standard passenger vehicle per axle tolls. You must use specially assigned tags for the RV plan though. Neither NY issuing authority charges a deposit for the tags if you have an automatic replenishment account.