Final answer:
Plumbing systems in buildings undergoing use or occupancy changes must adhere to the applicable building codes that ensure safety features like running water and structurally safe construction.
Step-by-step explanation:
Plumbing systems that are a part of a building or structure undergoing a change in use or occupancy, as defined by the building code, shall be in accordance with the requirements of the building codes that are applicable to the new use or occupancy.
These building codes are essential to ensure the safety of the inhabitants and include provisions for running water, working ventilation and heating systems, structurally safe construction, smoke detectors, and properly installed electrical wiring.
Changes in building use can significantly impact the plumbing requirements, and it is the responsibility of the engineers or contractors to ensure that the new plumbing systems are up to code.