12.3 Motor Carrier / Trucking and MCS-90

Motor Carrier and Truckers Coverage Forms

Businesses that haul goods for others have exposures the basic BACF does not fully address, so ISO offers two specialized forms:

• Truckers Coverage Form (CA 00 12) - the older form, designed for businesses hauling property for others.
• Motor Carrier Coverage Form (CA 00 20) - the modern, broader form that has largely replaced the Truckers form. A motor carrier is any person or business that transports property by auto in a commercial enterprise.

Both forms address the unique trucking problem of shared and transferred liability: when one trucker leases a tractor to another, or when trailers are interchanged among carriers, who is responsible? These forms add provisions and symbols (similar to the BACF but extended) to sort that out, plus optional trailer interchange coverage.

Trailer interchange and key trucking concepts

• Trailer interchange coverage insures the insured's legal liability for physical damage to a trailer the insured does not own but is in its care under a written trailer interchange agreement. Coverage applies whether or not the trailer is attached to a covered power unit.
• Private carrier - a business that hauls its OWN goods (covered well by the standard BACF).
• Common carrier / for-hire carrier - hauls for the public for compensation; needs the Motor Carrier form and federal filings.
• Bobtail - a tractor operating without a trailer. Deadhead - operating with an empty trailer.

Non-trucking use ("bobtail") liability can be a coverage gap when an owner-operator drives the tractor for personal use not in the business of the motor carrier they lease to.

The MCS-90 Endorsement

The MCS-90 (Endorsement for Motor Carrier Policies of Insurance for Public Liability) is required by the Federal Motor Carrier Safety Administration (FMCSA) for interstate for-hire motor carriers. It is mandated by the Motor Carrier Act of 1980.

The MCS-90 is NOT really insurance for the trucker - it is a financial responsibility guarantee to the public. It obligates the insurer to pay any final judgment against the insured for public liability resulting from negligence, even if the policy would otherwise exclude or not cover the loss (for example, if the trucker was operating outside policy terms or carrying a cargo the policy excluded).

The trick: if the insurer pays a claim under the MCS-90 that the underlying policy would NOT have covered, the insurer has the right to reimbursement from the insured for those amounts. It protects the public, not the insured's balance sheet.

MCS-90 minimum financial responsibility limits

The federally required minimums under the MCS-90 depend on what is hauled:

Exam tip: memorize $750,000 / $1,000,000 / $5,000,000 as the general non-haz / oil / hazmat tiers. The MCS-90 limit is a separate guarantee and is not reduced by the policy's underlying limits.

Private vs. For-Hire and the Bobtail Gap

Classify the carrier first. A private carrier hauls its own goods and is served well by the standard BACF. A common or contract (for-hire) carrier hauls for others for compensation, needs the Motor Carrier Coverage Form (CA 00 20), and must file federal financial-responsibility proof. The owner-operator who drives a leased tractor for personal use creates the bobtail (non-trucking-use) gap, which a Non-Trucking Use endorsement fills. Trailer interchange coverage handles physical damage liability for a trailer in the insured's care under a written interchange agreement.

Why the MCS-90 Protects the Public, Not the Trucker

The MCS-90 is a federal financial-responsibility guarantee, not insurance for the trucker. It forces the insurer to pay a final public-liability judgment from negligence even when the underlying policy would have excluded the loss, then lets the insurer seek reimbursement from the insured. Memorize the limit tiers - $750,000 for non-hazardous freight at 10,001+ lbs GVWR, $1,000,000 for oil and smaller-quantity hazardous substances, and $5,000,000 for hazmat, explosives, and large passenger carriers - because these dollar figures are tested verbatim.

Trailer Interchange and Filings

The trucking forms exist because liability shifts when carriers swap equipment. Trailer interchange coverage insures the insured's legal liability for physical damage to a trailer it does not own but holds under a written interchange agreement, whether or not the trailer is attached to a covered power unit. For-hire carriers operating in interstate commerce must also satisfy FMCSA financial-responsibility filings, of which the MCS-90 is the central document.

MCS-90 Reimbursement Right

The defining MCS-90 feature is the insurer's reimbursement right. When the endorsement forces the insurer to pay a public-liability judgment the underlying policy would have excluded - for example, an unlisted vehicle or an excluded cargo - the insurer pays the injured public first, then recovers that amount from the trucker. This is why the MCS-90 is described as protecting the public rather than the insured's balance sheet, and why exam answers stress that it does not broaden the trucker's own coverage.