This Standard specifies the design, installation, operation and maintenance of site-built and modular gaseous hydrogen fueling stations (HFS) for light duty vehicles, where light duty vehicles are defined by the Environmental Protection Agency as passenger cars and light trucks, minivans, passenger vans, pickup trucks, and sport-utility vehicles, also referred to as the "common category" which includes class 1, 2, 3 vehicles up to 14,000 lbs. The requirements are based upon United States and international codes and standards, but, where appropriate, local and federal codes and standards may supersede the requirements listed in this Standard.