Clean car standards are now in force, to tackle carbon dioxide emission levels in the transport sector.
From today, vehicle importers must have a C02 account and make sure their vehicles comply with new standards.
They are required to reduce C02 emissions to specific targets, which encourages a greater supply of low and no-emission vehicle imports.
Vehicles with a high CO2 emission value will incur a charge, the government says on its website. For vehicles below a set standard, a credit is given.
These are for importers for the first time, mirroring the 'fee-bates' that began for consumers last April under the Clean Car Discount.