The term 'municipal planning' as used in Part B of Schedule 4 of the Constitution includes the regulation and control of land use within municipal areas, including the introduction and enforcement of town planning schemes and the determination of whether and on what conditions townships may be established. This functional area is constitutionally reserved to the executive authority and administration of municipalities under section 156(1) of the Constitution and may not be assigned to other bodies by national or provincial legislation. The word 'planning' when used in the context of municipal affairs is commonly understood to refer to the control and regulation of land use, not merely conceptual forward planning without implementation. Constitutional interpretation must not approach the division of powers by starting with broader functional areas (like 'urban development') and reasoning inferentially, as this would denude narrower, specifically reserved powers (like 'municipal planning') of any meaningful content, thereby inverting the constitutional intention of devolving original powers to local government. Chapters V and VI of the Development Facilitation Act 67 of 1995, which purport to confer upon provincial development tribunals the authority to regulate land use within municipal areas, including approving land development applications and amending land use measures, are inconsistent with the Constitution and invalid.