The qualification only qualifies a range of thicknesses, diameters, and positions. For example, a test on a 20 mm thick casting qualifies thicknesses from 10 mm to 40 mm (depending on the standard's rules). Without the PDF, you might incorrectly extrapolate.
: Valid for all welding processes suitable for overlay, such as manual metal arc, TIG, plasma, and submerged arc welding.