All vehicles that meet the following criteria must pay RUC charges: Vehicles that have a manufacturer's gross laden weight of 3.5 tonnes or more Vehicles that use diesel, LPG, CNG or any other fuel not taxed at the source/pump These charges are paid to the NZ Transport Agency and enforced on the road by the NZ Police. RUC compliance requires commercial vehicles to have the correct RUC documents on display at all times to avoid a fine. Operating without the required RUC documentation to support your claims puts you at risk of incurring fines of up to $3,000 for individuals and $15,000 for businesses.