Which of the following statements are true about the Factories and Machinery Act 1967?
I. The Act includes provisions for the safety, health, and welfare of persons in factories.
II. It mandates the registration and inspection of all types of machinery, including those used for domestic purposes.
III. The Act was revised on 1st April 1974 and is referred to as the Laws of Malaysia Act 139.
IV. It defines a factory as any premises where trade for the purposes of gain to any business occurs, and where 5 or more persons are employed.