12.3 Motor Carrier / Trucking and MCS-90

Motor Carrier Coverage Form

The Motor Carrier Coverage Form, ISO form CA 00 20, is the modern trucking policy that replaced the older Truckers Coverage Form (CA 00 12). It applies to a motor carrier - a business that provides transportation by auto in the furtherance of a commercial enterprise, whether hauling its own goods (private carrier) or the goods of others for hire (for-hire carrier).

The form mirrors the BACF structure (liability, physical damage, conditions) but adds trucking-specific symbols and addresses exposures unique to interstate hauling, leased operators, and interchanged trailers.

Trucking liability is complicated by leasing. Owner-operators commonly lease their tractors to a motor carrier, and the carrier's policy must respond while the leased rig is in the carrier's service. The Motor Carrier form coordinates with federal leasing rules so the carrier's coverage reaches the operating units it directs, even when it does not title them.

Trucking Covered-Auto Symbols

The Motor Carrier form uses two-digit symbols in the 60s and 70s rather than 1-9:

Exam trap: Symbol 61 on the Motor Carrier form plays the same role as Symbol 1 on the BACF. Do not confuse the numbering systems between the two forms, because a question may show a 60s-series symbol to signal that the Motor Carrier form, not the BACF, is in force. Symbols 71 and 75 have no clean BACF equivalent and exist specifically for trucking exposures such as compulsory mobile equipment and trailer interchange.

Trailer Interchange

Trucking operations frequently swap trailers under trailer interchange agreements - a carrier delivers a loaded trailer, then picks up a different carrier's trailer to continue the route. Trailer interchange coverage (Symbol 75) insures the named insured's legal liability for physical damage to a trailer it does NOT own but holds under a written interchange agreement.

It is written on the same Comprehensive, Specified Causes of Loss, and Collision basis as owned physical damage, with its own limit and deductible. Without it, a carrier has no coverage for crushing or burning a borrowed trailer because care-custody-and-control is excluded under standard liability. The limit should reflect the value of the most expensive trailer the carrier is likely to hold at one time, since interchange limits apply per trailer in the insured's possession.

The MCS-90 Endorsement

The MCS-90 is a federally mandated endorsement (Motor Carrier Act of 1980 / 49 CFR) attached to policies of interstate for-hire motor carriers. It is the single most-tested trucking concept, and exam writers love to contrast it with ordinary coverage.

• It is NOT coverage - it is a surety/financial-responsibility guarantee to the public.
• It guarantees an injured member of the public is paid up to the federal minimum even if a policy exclusion would otherwise deny the claim (for example, an unscheduled or non-owned vehicle, or a pollution loss).
• The insurer that pays under the MCS-90 may seek reimbursement from the insured for any amount it would not have owed absent the endorsement.

In short, the MCS-90 protects the public, not the insured; the insured remains ultimately responsible. It exists so an injured motorist is never left uncompensated because a carrier let coverage lapse or operated a truck outside the policy terms. The reimbursement right keeps the insurer whole while still satisfying the federal mandate.

Federal Minimum Financial Responsibility

FMCSA minimum liability limits depend on what is hauled:

The MCS-90 fills the gap up to the applicable figure even when the policy limit or an exclusion would leave the public short. These minimums are floors set by the FMCSA; many shippers contractually require $1,000,000 combined single limit even for non-hazardous freight, and brokers often demand higher. The endorsement does not raise the policy limit - it merely guarantees the statutory floor to the public, then looks to the insured for repayment of any non-covered amount.

What the MCS-90 Really Does

The MCS-90 endorsement is a federally mandated public-protection guarantee, not true coverage: it forces the insurer to pay an injured member of the public up to the federal minimum even if the policy would otherwise exclude the loss (e.g., the truck was hauling an excluded commodity). The insurer can then seek reimbursement from the insured. So MCS-90 protects the public, not the trucker — a frequently tested nuance.

Federal Minimum Limits and Trailer Interchange

Federal financial-responsibility minimums vary by cargo: commonly $750,000 for general freight, $1,000,000 for oil/certain hazmat, and $5,000,000 for the most hazardous materials. Trailer interchange coverage handles physical damage to trailers of others the carrier possesses under an interchange agreement — a bailee exposure distinct from owned trailers. Matching the hazmat tier to the right minimum, and the borrowed trailer to trailer-interchange, are standard questions.