Truckers / Motor Carrier Coverage Form

The truckers coverage form (ISO form CA 00 12) and the newer motor carrier coverage form (ISO form CA 00 20) are the auto liability and physical-damage policy forms built specifically for businesses that haul property for hire. Where a general contractor or restaurant buys a plain business auto policy on the CA 00 01 form, a licensed motor carrier operating under FMCSA authority needs the trucking form because it addresses exposures the standard form ignores: hauling other people's freight, pulling interchanged trailers, and the reality that trucks are frequently hired, leased, or operated by owner-operators. The motor carrier form (CA 00 20) largely replaced the older truckers form and is broader — it more easily covers autos the insured hires, borrows, or uses under lease, which matters when carriers run mixed owned-and-leased fleets.

For a small-business buyer, choosing the right form is not academic — it drives whether a claim is paid. Both forms use covered-auto symbols to define exactly which vehicles are insured (the trucking forms use symbols 61–68 rather than the 1–9 range on the business auto form), and both integrate the MCS-90 endorsement and the truckers public-liability filing that federal law requires for interstate for-hire carriers. A key distinction: the trucking forms contain a private-passenger-type exclusion and are underwritten around freight radius, commodity, and gross vehicle weight rather than the light-vehicle assumptions baked into a standard commercial auto quote. If a for-hire carrier is written on the wrong form, gaps around hired units, trailer interchange, and filing compliance can leave the insured personally exposed.

A frequent point of confusion is how these primary trucking forms relate to the specialty coverages an owner-operator buys when leased to a motor carrier. The truckers/motor carrier form is the carrier's own liability policy while the truck is dispatched under load; by contrast, bobtail and non-trucking liability cover an owner-operator's tractor only when it is used outside the motor carrier's business (personal use or deadheading without a dispatch). Cargo damage is handled separately by motor truck cargo insurance, not by the auto form. Understanding which form governs — and when it responds — is the difference between a smooth freight claim and an uncovered loss.