Occupational Health and Safety Act 2004
Section 21. Duties of employers to employees
(1) An employer must, so far as is reasonably practicable, provide and maintain for employees of the employer a working environment that is safe and without risks to health.
(2) Without limiting sub-section (1), an employer contravenes that sub-section if the employer fails to do any of the following—
(a) provide or maintain plant or systems of work that are, so far as is reasonably practicable, safe and without risks to health.