Ethics Guidance for Occupational Health Practice 9th Edition - Book - Page 13
Worker - People who work for another (an employer) are basically of three kinds:
employees, employed under a contract of service; workers (employees and those who,
though not directly employed, undertake to do or perform personally any work or
services for another party to a contract whose status is not by virtue of the contract
that of a client or customer of any profession or business undertaking carried on by
the individual); and self-employed independent contractors. The term worker is used
in this document in most cases in a non-technical sense to describe an individual to
whom occupational health practitioners provide services and includes employees, job
applicants, contract workers, agency workers, students, apprentices and volunteers.
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