This is what the Virginia says about the special fuel tags -
You may choose to apply for clean special fuel license plates for a vehicle that utilizes only a clean special fuel. The vehicle must be exclusively powered by clean special fuel. The following types of fuels MAY qualify a vehicle for clean special fuel plates:
Compressed Natural Gas
Electricity
Ethane
Hydrogen
Hythane
Liquefied Natural Gas
Liquefied Petroleum Gas
Methane
Solar
Combination of two types of clean special fuels
Flexible fuel vehicle engines do not utilize only a clean special fuel; therefore, they do not qualify for these license plates.
NOTE: The Toyota Prius, Honda Insight and Honda Civic hybrids are classified as clean special fuel vehicles.
Only the DMV headquarters Special License Plates and Consignment Center can issue, reissue or transfer clean special fuel plates. These transactions cannot be conducted at a Customer Service Center, by an automated license agent or online dealer, or on the Internet.
The vehicle owner must submit an "Application for Personalized License Plates or Special Interest Series" (VSA 10). The entire vehicle identification number (VIN) and title number must be listed on the VSA 10.
My hunch is that the plates were stolen.
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