12.3 Motor Carrier / Trucking and MCS-90

The Motor Carrier Coverage Form

When a business hauls goods or passengers for others, ISO replaces the Business Auto form with the Motor Carrier Coverage Form (CA 00 20) — which superseded the older Truckers Coverage Form (CA 00 12) to keep pace with federal deregulation. It is built for carriers regulated by the Federal Motor Carrier Safety Administration (FMCSA) and addresses the unique exposure created when tractors and trailers from different owners are connected on the road.

Key definitions tested on the exam:

• A motor carrier transports property or passengers for hire, providing transportation as a commercial service to the public.
• A private carrier hauls its own goods incidental to its main business (a grocer's own delivery fleet); it often still uses the Motor Carrier form when federally regulated by weight or cargo.
• A for-hire carrier is either a common carrier (serves the general public) or a contract carrier (serves specific customers under contract).
• The form distinguishes owned, hired, and non-owned autos using symbol logic similar to the BAP, plus trucking-specific symbol options.

Trailer Interchange Coverage

When carriers swap trailers under interchange agreements, Trailer Interchange coverage insures the carrier's legal liability for physical damage to a trailer it does not own but holds in its possession under a written interchange agreement. It is written as direct primary coverage on the trailer using comprehensive, specified causes of loss, collision, or fire options, each with its own deductible.

It does not cover liability to other people or their cargo — only physical damage to the borrowed trailer itself. This is the classic distractor: trailer interchange is physical damage to a non-owned trailer, never third-party bodily injury.

Federal Filing Requirements (Form MCS-90)

The MCS-90 endorsement — formally the Endorsement for Motor Carrier Policies of Insurance for Public Liability — is filed with the FMCSA as proof of financial responsibility. It does not add coverage in the normal sense; it is a surety-like guarantee that the insurer will pay judgments for public bodily injury or property damage (including environmental restoration from a hazmat spill), even if the policy itself would exclude the loss or the vehicle was not scheduled.

Crucial exam points about the MCS-90:

• It pays the public (innocent third parties) up to the filing amount, then the insurer recovers from the insured any amount it would not otherwise have owed under the policy terms.
• It applies regardless of which vehicle was involved or whether that vehicle was listed on the policy.
• It is triggered when underlying coverage is absent or insufficient — a public safety net, not a coverage grant to the insured.

Minimum Financial Responsibility Limits

Worked Example

A for-hire interstate carrier hauling ordinary furniture in an 18-wheeler must carry the $750,000 minimum. If that same carrier instead hauls gasoline in a cargo tank, the minimum jumps to $1,000,000; if it carries explosives or large-bulk hazardous materials, it rises to $5,000,000. The MCS-90 ensures the public is paid up to the applicable filing amount even if the carrier mis-described its cargo or operated a truck not shown on the policy — after which the insurer can pursue reimbursement from the carrier.

The Motor Carrier Coverage Form

Trucking operations that haul property for others use the Motor Carrier Coverage Form (CA 00 20) (and the older Truckers form) rather than the basic Business Auto form. It addresses exposures unique to motor carriers - trailer interchange (liability for trailers of others in the insured's possession under an interchange agreement), hired and borrowed power units, and the constant movement of equipment across jurisdictions. Symbols are tailored to motor carriers, and the form coordinates with federal filings required of interstate haulers.

The MCS-90 Endorsement

The MCS-90 is a federally mandated endorsement for interstate motor carriers of property, required by the Motor Carrier Act and enforced by the FMCSA. It is not coverage in the ordinary sense - it is a surety-like public-protection guarantee. If the trucker's policy would not otherwise pay an injured member of the public (for example, the loss falls outside the policy's terms or limits), the MCS-90 obligates the insurer to pay the judgment up to the federal financial-responsibility minimum and then recover that payment from the insured. It exists to ensure the motoring public is compensated, not to benefit the insured.

Financial-Responsibility Minimums and a Worked Point

Federal minimums under the MCS-90 vary by cargo: commonly $750,000 for general freight, rising to $1,000,000 for oil and certain hazardous materials and $5,000,000 for the most dangerous materials. Worked point: a trucker uses a vehicle in a way the policy excludes and injures a third party, with a $900,000 judgment. The insurer, despite the exclusion, must pay up to the $750,000 (or higher applicable) federal minimum under the MCS-90 to protect the public, then seek reimbursement from the insured for what it paid. Recognizing the pay-then-recover mechanism is the key exam fact.