The inspecting organization shall stamp the qualification mark (annex 7) on the specification of Mobile Cranes for the traveling cranes qualified in the usage inspection or deemed qualified according to Paragraph 2 of Article 24, after being signed by the Inspector, one (1 ) copy of the specification 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.The inspecting organization shall issue the Report for Results of Usage Inspection (Annex 16) and Qualification Certificate (Annex 17) to traveling cranes qualified in the completion inspection, the maximum period of validity for the aforesaid documents shall be two (2 ) years.The Employer shall hang the aforesaid Qualification Certificate or its photocopy in the driving cab of the cranes or at the distinct locations in the workplace.