Regulations for Safety Inspection of Hazardous Machines and Equipment Article 104
The inspecting organization shall stamp the qualification mark (annex 34) on the Detailed List of Category Ι pressure vessels for Category Ι pressure vessels qualified in the completion test or deemed qualified according to paragraph 3 of Article 13, 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.