(3) The Director may in any particular
case permit in writing any person, other
than a person mentioned in subsection (1) or
(2), to carry out lift works or escalator
works, as the case may be.
(4)
For the purposes of this section
"competent lift worker" means a person
(a) who is the holder of a certificate
in mechanical engineering, or
electrical or electronic
engineering, or who has completed
a course relating to lifts at any
technical institute or Vocational
Training Centre or such equivalent
course as is approved by the
Director, and has undergone such
craft apprenticeship in lift works
as is approved by the Director for
a period, or an aggregate period,
of not less than 4 years; or
(b)
who has been in the employment,
for a period, or an aggregate