In planning law, the planning of land use by state institutions is in the foreground. It can be divided into the sectoral planning law and the overall planning law. Sectoral planning law concerns the planning of individual areas of matter, such as waste and energy management, transport routes, or landscape planning. Overall planning law, by contrast, considers cross-cutting requirements for land use in specific areas and coordinates the individual sectoral plans. In the field of overall planning, public building law plays a particularly large role. It is divided into the nationwide building planning law and the respective state-level building regulations. Building planning law is mainly laid down in the Building Code (BauGB) and the Building Use Ordinance (BauNVO) and ensures, through provisions on the permissible use of land and ground, the urban development of municipalities. Building regulations are safety and order law and aim at public safety and order, life, and health of citizens on site. The spatial planning law also relates to overall planning. It contains the norms for the development, organization, and safeguarding of supra-local plans and measures. In Germany, this is codified nationwide in the Spatial Planning Act (ROG) and at the state level in the state laws on spatial planning.