Summary: The signs coverage form (CM 00 28 09 00) is one of the forms of the current inland marine program of Insurance Services Office. According to ISO's manual, it affords open perils coverage only for neon, fluorescent, automatic, or mechanical electric signs and lamps. Ineligible for coverage are billboards or ordinary fixed signs, whether or not they are directly illuminated by electric lights.

Under the inland marine program's modular format, a complete signs policy is formed by combining a signs coverage form with a declarations page—where all covered property is scheduled with limits of insurance—a common policy conditions form, and an inland marine general conditions form. Alternately, these forms may be added to forms and endorsements of the other commercial lines programs to form a commercial package policy.