Model plumbing codes are published on a three-year cycle. A state adopts one of those editions with statewide amendments, and a city then adopts the state code with additional local amendments. Which document governs an installation in that city?

Giải thích

A model code is a template with no legal effect on its own; it becomes enforceable only when a state or local jurisdiction adopts it, usually with amendments that reflect local climate, soil and practice. The locally adopted amended edition therefore controls, and the authority having jurisdiction interprets it, with a board of appeals available to hear disputes over that interpretation. Newer published editions do not apply until adopted, which is why a jurisdiction may still be enforcing an edition several cycles old. Manufacturer instructions must be followed for listed and labeled products but cannot override an adopted code requirement.