Section 20(1)(a) of the Private Security Industry Regulation Act 56 of 2001, read with the definition of 'security service' in section 1(a), when interpreted contextually and purposively, means the protection or safeguarding of persons or property from unlawful physical harm, including injury, physical damage, theft, or kidnapping caused by another person. It does not extend to protection from natural hazards or animal harm. This interpretation is required by section 39(2) of the Constitution and is supported by the Act's preamble, purpose, and overall context. Farm workers employed specifically to provide security services against criminal threats for remuneration are security service providers who must register under section 20(1)(a). In-house security personnel are part of the private security industry and subject to the Code of Conduct. Sections 28(2) and 28(3)(b) constitutionally extend the Code to employers of in-house security to the limited extent of ensuring minimum wages and preventing exploitation, which is rationally connected to the legitimate purpose of protecting vulnerable workers.