The Commissioner of Labor shall have the following duties in addition to any other duties prescribed by law:
1. Examine, certify and renew the certification of qualified applicants and keep a record of all such proceedings;
2. Promulgate rules concerning the quality of welds and qualification of welders;
3. Designate and approve persons qualified to administer welding tests; and 4. Designate and approve shops, testing facilities or other establishments qualified for testing coupons and weldments.