period, of not less than 4 years,
of any registered lift contractor
and is considered by the
registered lift contractor by whom
he is employed to carry out the
lift works to have had sufficient
experience or training in lift
works of that particular type so
as to carry out such lift works
competently without supervision;
"competent escalator 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 escalators 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
escalator works as is approved by
the Director for a period, or an
aggregate period of, not less than
4 years; or