True or False: An F endorsement is valid nationwide.

The F endorsement allows a driver to transport hazardous materials or certain commercial vehicles. While the endorsement itself is recognized across the United States, its use is subject to compliance with specific regulations that vary by state. Each state may have its own additional requirements or restrictions regarding the transportation of hazardous materials, meaning that drivers must adhere to both federal regulations and the unique rules of the states they operate in. This is why the statement is accurate; the F endorsement is valid nationwide, but it also requires the driver to follow pertinent state regulations wherever they are operating.