Under the Work Health and Safety Act 2020 (WA) duties are placed on persons conducting a business or undertaking (PCBU) to ensure as is 'reasonably practicable' the health and safety of workers engaged or caused to be engaged or workers whose activities in carrying out the work are influenced or directed by the person.

Using applicable legislation and case law, discuss the scope and nature of this duty. Be sure to include case examples to support your findings (note that cases decided under previous Occupational Health and Safety law can be included).