Hi Cole,
"clause 4 section 4.2.2.2 it says that each manufacture or contractor
shall be responsible for the qualification of welders." -quote Note the word "shall"
Just like it states, the Manufacturer or Contractor are the ones who need to make sure their welders(employees) are qualified to perform the necessary welding. Most companies that hire welders will administer a welding test to any applicants applying for a welding position within their company, regardless if they come in the door with a briefcase full of certification papers.