12.3 Motor Carrier / Trucking and MCS-90

Trucking Forms

Businesses that transport goods are insured on the Motor Carrier Coverage Form (ISO CA 00 20), which since 1993 has largely replaced the older Truckers Coverage Form (CA 00 12). A motor carrier is a business that transports property by auto in a commercial enterprise, whether for hire (a common or contract carrier) or carrying its own goods (a private carrier).

These forms parallel the Business Auto form but use a different symbol band and add coverages for the unique trucking exposures of leased equipment, interchanged trailers, and federal financial responsibility.

Motor Carrier Symbols 31-44

Symbol 31 (Any Auto) is the broadest, mirroring Symbol 1 on the Business Auto form. The higher numbering keeps trucking declarations distinct from standard business-auto declarations.

Who Is Insured - The Leasing Problem

Trucking uses extensive equipment leasing. When an owner-operator leases a truck to a carrier, the federal Motor Carrier Act leasing rules make the carrier responsible for the vehicle during the lease. The Motor Carrier form addresses this through the trucking-specific insured definition and leasing endorsements that allocate coverage between the lessor (owner-operator) and lessee (the carrier whose authority is used).

The MCS-90 Endorsement

The MCS-90 (full name: Endorsement for Motor Carrier Policies of Insurance for Public Liability) is required by the Federal Motor Carrier Safety Administration (FMCSA) for carriers operating in interstate commerce. It guarantees the public that an injured party will be paid up to the federal minimum even if the policy would otherwise not respond.

Key exam point: The MCS-90 is not coverage for the insured - it is a surety-like guarantee to the public. If the insurer pays a claim solely because the MCS-90 forced payment (for example, the vehicle was not a covered auto), the insurer is entitled to reimbursement from the motor carrier for every dollar paid. The carrier remains the true debtor.

Worked Scenario

A carrier hauling chemicals lets its policy lapse on a particular tractor by failing to schedule it. The truck causes a $900,000 injury. Because the carrier holds an MCS-90 and hauls hazardous materials, the insurer must pay the injured public up to $1,000,000 despite the coverage gap. The insurer pays the $900,000 judgment, then bills the carrier for the full amount under the reimbursement clause.

Trailer Interchange and Motor Truck Cargo

• Trailer Interchange covers physical damage to non-owned trailers in the insured's possession under a written interchange agreement - common in less-than-truckload (LTL) operations.
• Motor Truck Cargo insurance (a separate inland marine form) covers the goods being hauled - the Motor Carrier liability form does NOT pay for damaged cargo.

Trap: Students assume the MCS-90 or the liability form pays for the freight. It does not; cargo is a separate inland marine policy.

Motor Carrier vs. Truckers Form

The older Truckers Coverage Form was built around the for-hire trucking model and used a leasing-centric insured definition. The Motor Carrier Coverage Form is broader: it applies to any business that uses autos to transport property in commerce, for hire or not, making it the modern default. Both use trucking symbols rather than the 1-9 business-auto band, and both contemplate owner-operator leasing and trailer interchange, but exam questions referencing the current ISO trucking form mean the Motor Carrier form.

Coverage While Leased

A recurring exam scenario: an owner-operator leases his rig to Carrier A. While operating under Carrier A's authority and placards, the carrier's policy generally responds. When the rig is used for the owner-operator's own purposes (bobtailing home, or hauling under no one's authority), a non-trucking use (bobtail) endorsement on the owner-operator's policy responds instead. The dividing line is whose authority and dispatch the truck operates under at the moment of loss.

Financial Responsibility Filings

Beyond the MCS-90, interstate carriers file Form BMC-91 or BMC-91X with the FMCSA as proof of the required public liability limits. Intrastate carriers file equivalent state forms. These filings are the regulator's evidence that the carrier carries the mandated minimums; the MCS-90 is the contractual mechanism that makes the insurer pay the public if the underlying policy fails.

Trucking forms and the public-policy MCS-90

Trucking risks use the Motor Carrier Coverage Form (CA 00 12) or the older Truckers form, which add concepts the business-auto form lacks - trailer interchange (liability for damage to a trailer in the insured's possession under an interchange agreement) and definitions for for-hire carriers. Layered on top for interstate motor carriers is the MCS-90 endorsement, a federally mandated financial-responsibility endorsement.

Its purpose is public protection, not coverage for the insured: it guarantees the carrier will pay an injured public claimant up to the federal minimum (commonly $750,000 to $5,000,000 depending on cargo) even if the underlying policy would otherwise exclude the loss.

The reimbursement twist that defines MCS-90

The most tested MCS-90 point is its reimbursement mechanism: if the insurer pays a claim under the MCS-90 that the policy itself did not actually cover, the insurer is entitled to recover that payment from the insured (the motor carrier). So the MCS-90 does not broaden the carrier's own coverage - it backstops the public, then claws the money back from the trucker. A scenario where a carrier hauls a commodity the policy excluded, causes injury, and the MCS-90 pays the victim while the insurer bills the carrier is the classic exam illustration.