Service contracts commonly describe the covered item and the use it was sold for. That description can appear in the definitions, the eligibility clause, or the conditions section. A change in how the item is used can change what the contract says, even when the item and the owner stay the same.
Read the use words
Look for terms such as household, personal, residential, commercial, business, rental, or occupancy. Read how the form defines each one. A term that sounds plain, such as residential, may leave out a rental unit, a shared space, or a home office with customer visits, depending on how the contract defines it. Read the definition, not the adjective.
Check what counts as a change
Ask whether a change in use must be reported, whether it ends coverage, or whether it changes the terms only while the new use lasts. Some contracts treat a short change differently from a sustained one. Some treat a move of the item to another location as a change in use. Find the clause that names the change and write down what it requires you to do.
Where the state rule enters
The state where you buy may have its own rules about what a service contract must say and how it is regulated. Those rules are separate from the use definition in the form, and they do not replace it. Pick the state, open its page on this site, and read the statute that page cites. This article does not restate any state's rule on use. The Arizona page shows how one state's rules and roster are set out: Arizona service contract rules and roster.
Keep the use record
If the way you use the item changes, write down the new use, the date it began, and any notice you sent to the seller. Keep that notice with the contract file. A notice you can prove is worth more than a conversation you remember.