Concerning requirements for new buildings, if state or local laws demand more than the requirements of federal law, people must comply with:

When it comes to compliance with building requirements, if state or local laws impose stricter regulations than those at the federal level, individuals and businesses are required to adhere to the more stringent state or local laws. This principle ensures that each jurisdiction can enforce rules that they deem necessary for safety, environmental protection, or other factors relevant to their community's needs.

The rationale behind this is rooted in the concept of federalism, where state and local governments have the authority to enact laws that can be more rigorous than federal standards. As a consequence, when there is a conflict between federal and state or local laws, compliance with the stricter regulations is mandated. This protects the health, safety, and welfare of residents according to the specific conditions and needs of the local area, which may not be adequately covered by broader federal regulations.

In summary, adherence to the more stringent state or local laws is essential to ensure compliance with all legal requirements while also recognizing the authority of local governance to establish higher standards.