A retailer or WPC dispensing heating oil, 500 ppm LM diesel fuel, or ECA marine fuel must apply labels to fuel dispensers as follows:
Heating Oil
Warning
Federal law prohibits use in highway vehicles or engines, or in nonroad, locomotive, or marine diesel engines.
Its use may damage these diesel engines.
Locomotive and Marine Diesel Fuel (500 ppm Sulfur Maximum)
Warning
Federal law prohibits use in nonroad engines or in highway vehicles or engines.
ECA Marine Fuel (1,000 ppm Sulfur Maximum)
For use in Category 3 (C3) marine vessels only.
Warning
Federal law prohibits use in any engine that is not installed in a C3 marine vessel; use of fuel oil with a sulfur content greater than 1,000 ppm in an ECA is prohibited except as allowed by 40 CFR part 1043.
40 C.F.R. §1090.1515
If a pump dispensing 500 ppm LM diesel fuel is labeled with the "LOW SULFUR LOCOMOTIVE AND MARINE DIESEL FUEL (500 ppm Sulfur Maximum)" label, the retailer or WPC does not need to replace this label.