(the type varies depending on the use of the vehicle and number of seats). For licenses first acquired after 1997, that weight was reduced to , not including trailers. Since 2013, the C1 license category allows driving vehicles over 3.5 and up to 7.5 tonnes. The C license category allows driving vehicles over 3.5 tonnes with a trailer up to 750 kg, and the CE category allows driving category C vehicles with a trailer over 750 kg. South Africa To drive any vehicle with a GVM exceeding , a code C1 drivers license is required. Furthermore, if the vehicle exceeds a code C license becomes necessary. To drive any vehicle in South Africa towing a trailer with a GVM more than , further restrictions apply and the driver must possess a license suitable for the GVM of the total combination as well as an articulated endorsement. This is indicated with the letter "E" prefixing the license code. In addition, any vehicle designed to carry goods or passengers may only be driven by a driver possessing a Public Driver's Permit, (or PrDP) of the applicable type. This is an additional license that is added to the DL card of the operator and subject to annual renewal unlike the five-year renewal period of a normal license. The requirements for obtaining the different classes are below. "G": Required for the transport of general goods, requires a criminal record check and a fee on issuing and renewal. "P": Required for the transport of paying passengers, requires a more stringent criminal record check, additionally the driver must be over the age of 21 at time of issue. A G class PrDP will be issued at the same time. "D": Required for the transport of dangerous materials, requires all of the same checks as class P., and in addition the driver must be over 25 at time of issue. United States In the United States, a commercial driver's license is required to drive any type of commercial vehicle weighing or more. The federal government regulates how many hours a driver may be on the clock, how much rest and sleep time is required (e.g., 11 hours driving/14 hours on-duty followed by 10 hours off, with a maximum of 70 hours/8 days or 60 hours/7 days, 34 hours restart ) Violations are often subject to significant penalties. Instruments to track each driver's hours must sometimes be fitted.