28. The Government may, by regulation, for each class of pressure vessels it indicates, establish the duties payable for(1) the issue of a certificate provided for by this Act;
(2) the inspection of a pressure vessel;
(3) the labelling of a pressure vessel;
(4) the examination and approval of plans and specifications or other documents;
(5) the verification and approval of a quality control program for a pressure vessel;
(6) the approval, revision and registration of a welding procedure;
(7) the qualification examinations of a welder or a person to whom the Minister may delegate powers.