As can be seen, the definition of worker under section 91(1) is restrictive given the persons exempted in terms of paragraphs (a) to (f) of the definition. The point is that section 91(1) defines a worker only for the purposes of the Labour Act; as such, not all employees are workers for purposes of the Labour Act. The category of persons under paragraphs (a) to (f) of the definition of a worker may thus be employees but not workers for purposes of the Labour Act. Section 91(1) of the Labour Act defines a worker by reference to an employer i.e. as one who entered into or works under a contract with an employer. So, who is an employer? The same section 91(1) defines an “employer” to mean “any person who has entered into a contract of employment to employ any other person as a worker either for himself or for the service of any other person, and includes the agent, manager or factor of the first-mentioned person and the personal representatives of a deceased employer”. The common denominator in the definition of a worker and an employer is the contract of employment. A “contract of employment” is thus defined by same section 91(1) to mean “any agreement, whether oral or written, express or implied, whereby one person agrees to employ another as a worker and that other personagrees to serve the employer as a worker”.
— B.B. Kanyip, J. Olatunji v UBER (2018) – NICN/LA/546/2017