The inspecting organization shall issue the qualification certification for the inspection (Annex 39, 39-1) and stamp the qualification mark (annex 34) on the Detailed List of vessels for high-pressure gases for vessels for high-pressure gases qualified in the structure test, after signed by the Inspector, 1 copy of the list shall then be delivered to the applicant, and the qualification mark shall be printed, painted or posted at distinct part of the object inspected for identification.However, the qualification certificate for vessels for high-pressure gases mounted on vehicles shall be issued after they are assembled and fixed on the chassis. The period of validation for the qualification certificate of inspection mentioned in the previous subparagraph shall be in accordance with the stipulations in Article 155.