12.3 Motor Carrier / Trucking and MCS-90
Key Takeaways
- The Motor Carrier Coverage Form (CA 00 12) insures for-hire trucking and adds trailer interchange coverage.
- The MCS-90 endorsement is a federal public-protection guarantee, not ordinary coverage for the insured.
- When the policy would not pay, the MCS-90 insurer pays the injured public, then seeks reimbursement from the insured.
- MCS-90 minimums: $750,000 non-hazardous, $1,000,000 oil/hazardous, $5,000,000 explosives/poison gas.
- Non-trucking (bobtail) use is excluded from the motor carrier policy and insured separately by the owner-operator.
The Motor Carrier Coverage Form (CA 00 12)
The Motor Carrier Coverage Form (CA 00 12) replaced the older Truckers Coverage Form (CA 00 13) for most accounts and is the form used to insure businesses that transport property by auto for hire or as part of a commercial enterprise. It mirrors the Business Auto Form's structure but adds trucking-specific concepts such as trailer interchange and the treatment of autos operated under leasing/operating agreements.
It uses the same symbol logic, but trucking risks add symbols for trailer interchange:
- Trailer interchange covers a trucker's legal liability for loss to a non-owned trailer in the insured's possession under a written interchange agreement.
- Coverage applies whether the trailer is connected or disconnected from a covered auto.
Federal financial responsibility — Form MCS-90
Federal law (the Motor Carrier Act of 1980, enforced by the FMCSA) requires for-hire interstate motor carriers to maintain minimum public liability limits. Compliance is evidenced by the MCS-90 endorsement (Endorsement for Motor Carrier Policies of Insurance for Public Liability).
The MCS-90 is not coverage in the ordinary sense — it is a surety-like guarantee to the public. If the underlying policy would not pay (e.g., the vehicle was not a scheduled auto, or a coverage exclusion applies), the insurer must still pay an injured member of the public up to the federal minimum, and then the insurer is entitled to reimbursement from the insured. Memorize this reimbursement feature — it is the defining MCS-90 trap.
MCS-90 minimum limits
The required minimum financial responsibility depends on what is hauled:
| Commodity hauled | Minimum limit |
|---|---|
| Non-hazardous freight (vehicles ≥ 10,001 lbs) | $750,000 |
| Oil / certain hazardous substances | $1,000,000 |
| Hazardous materials, explosives, poison gas | $5,000,000 |
| For-hire passenger carriers (16+ seats) | $5,000,000 |
| For-hire passenger carriers (15 or fewer) | $1,500,000 |
Trap: the MCS-90 limit is a public-protection floor, not the policy's own liability limit. The endorsement pays the injured public when the policy doesn't, then seeks reimbursement; it does not add coverage that benefits the insured.
Who an 'insured' is and bobtailing
Under leasing arrangements, an owner-operator's tractor may be covered while under dispatch for the trucking company. Non-trucking use (bobtail/deadhead) — operating the tractor without a trailer and not under dispatch — is typically excluded under the motor carrier policy and is insured separately by non-trucking liability (bobtail) coverage purchased by the owner-operator. Distinguishing 'under dispatch' from personal/bobtail use determines which policy responds.
How the MCS-90 Actually Operates
The MCS-90 is a federal public-protection guarantee, not first-party coverage. If a judgment arises from the carrier's negligent operation and the policy would not otherwise pay (an excluded auto, a coverage gap, or a lapse), the insurer pays the injured public up to the federal minimum and then seeks reimbursement from the insured. In effect it converts the policy into surety-like protection for the public while preserving the insurer's right to recover from the motor carrier. This is why a carrier cannot rely on the MCS-90 as real coverage — it can be billed back for every dollar the insurer advances under it.
Trailer Interchange, Bobtail, and Form Choice
The Motor Carrier Coverage Form (CA 00 12) adds trucking concepts. Trailer interchange coverage insures a trailer in the insured's possession under a written interchange agreement, even though the insured does not own it. Non-trucking liability (bobtail) covers a tractor operated without a trailer and not under dispatch — a use the motor carrier policy excludes — and is bought separately by owner-operators. Hired-auto and lessor/lessee rules determine whether the trucking company or the owner-operator is the insured during dispatch.
The exam contrasts the older Truckers Form (CA 00 13) with the current Motor Carrier Form and asks which financial-responsibility minimum applies to a given commodity, so memorize the $750,000 / $1,000,000 / $5,000,000 tiers.
Federal Minimums by Commodity
The federal financial-responsibility minimums depend on what is hauled and appear repeatedly on the exam: $750,000 for general (non-hazardous) freight in vehicles over 10,000 pounds; $1,000,000 for oil and certain hazardous substances; $5,000,000 for hazardous materials, explosives, and poison gas; and $5,000,000 for for-hire passenger carriers of 16 or more passengers (a lower $1,500,000 applies to smaller passenger vehicles). These limits are evidenced by filing the MCS-90 for property carriers and the BMC-91/91X for passenger carriers.
A carrier that hauls a higher-hazard commodity than its filing assumes is out of compliance, which the FMCSA can penalize.
Intrastate vs. Interstate and Filing Forms
The MCS-90 applies to interstate for-hire carriers regulated by the FMCSA; intrastate carriers follow their state's filing requirements, which may use a state form rather than the MCS-90. Producers must also know that the MCS-90 attaches to the policy by endorsement and follows the carrier, not a specific vehicle, so it can respond even for an auto not otherwise scheduled — then bill back the insured. This federal-guarantee mechanism, combined with trailer-interchange and bobtail coverage, makes trucking accounts a distinct specialty the exam treats separately from ordinary commercial auto.
An uninsured (under the policy terms) truck owned by a for-hire carrier injures a member of the public. The auto was not a scheduled covered auto, so the business auto policy would normally not pay. What does the MCS-90 endorsement require?
A for-hire carrier transports general non-hazardous freight in vehicles over 10,001 lbs in interstate commerce. What is the minimum federal financial responsibility limit shown by the MCS-90?