①On finding it to be necessary to do so in order to ensure uniformity in the regulation of traffic on nationwide arterial roads (other than national expressways and limited highways that the National Public Safety Commission designates in accordance with the standards that Cabinet Order prescribes), the National Public Safety Commission may instruct a public safety commission, pursuant to Cabinet Order, regarding the handling of administrative processes involving the maximum speed limit for vehicles or streetcars and other things that Cabinet Order prescribes over which the public safety commission has authority under this Act.

②The National Public Safety Commission may instruct a public safety commission regarding the enforcement of this Act on a national expressway or limited highway it designates pursuant to the preceding paragraph, on finding it to be particularly necessary to do so in order to prevent hazards or otherwise ensure the safety and fluidity of traffic on those roads.