Final answer:
The duration of mandatory warranty coverage for distribution systems varies and is dictated by state law in the United States, often around 2 years. However, coverage for structural defects may extend to 10 years, depending on the specific warranty terms.
Step-by-step explanation:
Mandatory warranty coverage duration for distribution systems varies by jurisdictions and what the warranty covers. You did not specify a country or type of product, but generally speaking, if we take the home building industry as an example, in the United States, the duration for mandatory warranty coverage can be mandated by state law. For most states, coverage for distribution systems, which can include electrical, plumbing, heating, and air conditioning systems, is typically around 2 years.
In some cases, however, warranty for major structural defects can extend up to 10 years. Again, this is highly dependent on the state law and the type of warranty. It is important for homeowners or buyers to review their warranty documents and understand the specific terms and durations stated therein.