Insurance Services Office, Inc. (ISO), commercial property insurance forms that define, limit and explain what property or property interest is covered. An ISO commercial property policy consists of:one or more coverage forms, one or more causes of loss forms, the commercial property conditions form, the common policy conditions form, and the declarations. The most widely used ISO commercial property coverage forms are the building and personal property coverage form (CP 00 10) and the business income and extra expense coverage form (CP 00 30).