To qualify for a 4th Class Power Engineer’s Certificate of Competency, a candidate must
(a) pass the 4th Class Power Engineering Certificate of Competency examination, and
(b) have been employed for a period of
(i) 6 months, assisting in the operation of a power plant that has a capacity exceeding 250 kW, or in a pressure plant that has an operating capacity satisfactory to the Administrator,
(ii) 3 months in a power plant described in clause (i), have been employed for a period of 12 months in a capacity satisfactory to the Administrator in the design, construction, installation, repair, maintenance or operation of pressure equipment to which the Act applies, or
(iii) 12 months in a heating plant that has a capacity exceeding 750 kW while holding a Building Operator A Certificate of Competency, a Building Operator B Certificate of Competency or a 5th Class Power Engineer’s Certificate of Competency.