Section 197(1) of the Constitution expressly vests competence in national legislation to structure and regulate the functioning of the public service as a whole, including provincial administrations. This is not limited to regulating the personnel corps but extends to the organizational structure within which the public service functions. An implied provincial power to structure provincial administrations cannot be found where it would contradict the express provisions of section 197(1). The executive power of provinces under section 125, which includes implementing legislation and coordinating functions, does not include the power to determine the structural framework of the provincial public service - that framework must be established by national legislation. What the Constitution guarantees to provinces is the power to recruit, appoint, promote, transfer and dismiss members of the public service in their administrations (section 197(4)), not the power to determine the structural framework itself. National legislation may lawfully assign specific functions to particular posts in the provincial public service, including to the provincial Director-General, provided this does not prevent provinces from effectively exercising their constitutional powers. The requirement that a Premier request the President to establish or abolish provincial departments, with the President acting only if satisfied the request is constitutional and lawful, does not infringe provincial executive authority and is consistent with cooperative government. However, national legislation may not empower a Minister to transfer functions between provincial and national spheres of government, or to and from provincial departments, without the consent of the Premier, as this would infringe the executive authority of provinces to administer their own laws. Section 41(1)(g), which prohibits encroachment on the geographical, functional or institutional integrity of government in another sphere, does not prevent the national sphere from exercising powers expressly vested in it by the Constitution, provided such exercise does not undermine other spheres or prevent them from functioning effectively.