Section 7. Conditions precedent for manufacture of boiler and boiler components.

No person shall manufacture or cause to be manufactured any boiler or boiler components, or both, unless--- (a) the premises or precincts wherein boiler or boiler components, or both, are manufactured, have such facilities for design and construction as may be specified by regulations; (b) a certificate for the design and drawings of the boiler and boiler components have been granted by the inspecting authority under clause (a) of sub-section (3) of section 8; (c) the material, mounting and fitting used in the construction of boiler or boiler components, or both, conform to such specifications as may be specified by regulations; and (d) the person engaged in welding boiler or boiler components hold welders certificate granted by the competent authority under sub-section (4) of section 6.