Final answer:
Plumbing systems must comply with the building code or standards set by the local authority. This ensures safety, reliability, and efficiency in accordance with regulations.
Step-by-step explanation:
Plumbing systems shall be designed, constructed, and maintained in accordance with this code or the Authority Having Jurisdiction. This means that whoever is responsible for the plumbing in any building must ensure that it meets specific regulations and standards set forth by the governing building code or by the local authorities responsible for enforcing such codes. The code ensures that all plumbing systems are safe, reliable, and efficient to protect public health and the environment.