(a) to secure the safety, health and welfare of persons at
work against risks to safety or health arising out of the
activities of persons at work;
(b) to protect persons at a place of work other than persons
at work against risks to safety or health arising out of the
activities of persons at work;
(c) to promote an occupational environment for persons at
work which is adapted to their physiological and
psychological needs;
(d) to provide the means whereby the associated occupational
safety and health legislations may be progressively replaced
by a system of regulations and approved industry codes
of practice operating in combination with the provisions
of this Act designed to maintain or improve the standards
of safety and health.