Final answer:
When relocating parts of a plumbing system, adherence to building codes is required to ensure safety and functionality, with common standards being the IPC or UPC.
Step-by-step explanation:
Parts of the plumbing system of a building or part thereof that are moved from one foundation to another, or from one location to another, can be in accordance with the provisions of building codes for new installations. When relocating plumbing systems, it's essential to comply with these regulations to ensure that the system continues to be safe and functional. Such codes may include the International Plumbing Code (IPC) or the Uniform Plumbing Code (UPC), which are standards for the design and installation of plumbing systems to promote the public's health, safety, and welfare.