CA 23 30 Motor Carrier Endorsement

An Insurance Services Office (ISO) standard form. It adapts the Business Auto Coverage Form for motor carriers: it rewrites who is an insured for hired, borrowed and leased autos and trailers, adds trailer interchange coverage for trailers you don't own, and replaces the other insurance condition with primary and excess rules for autos leased to or from other motor carriers.

1. 09 27 edition

   Sep 2027, compared with 12 23Latest edition

   • Someone using a covered auto while working in a business of storing autos is now also not an insured, unless the business is yours.

     12 23

     “selling, servicing, repairing or parking "autos" unless that business is yours”

     09 27

     “repairing, parking or storing "autos" unless that business is yours”

   • Rail, water or air carriers are also not insureds for a covered pollution cost or expense involving a detached trailer they are transporting or loading.

     12 23

     Not in this edition

     09 27

     “"bodily injury" or "property damage" or a "covered pollution cost or expense"”

   • Trailer interchange coverage now excludes mechanical or electrical malfunction and failure of the trailer's computer system, including failure caused by a cyber incident.

     12 23

     “Wear and tear, freezing, mechanical or electrical breakdown.”

     09 27

     “Failure, malfunction or inadequacy of the covered "trailer's" "computer system"”

   • Trailer interchange coverage now excludes loss to personal or confidential information stored or used by the trailer's computer system, unless the manufacturer deems it necessary for the trailer's operation.

     12 23

     Not in this edition

     09 27

     “We will not pay for "loss" to "personal or confidential information or material"”

2. 12 23 edition

   Dec 2023, compared with 11 20

   • Another motor carrier, and its employees, agents or drivers, using your covered trailer in its own business is no longer an insured.

     11 20

     Not in this edition

     12 23

     “Another "motor carrier" or any "employee", agent or driver of that "motor carrier", while using a covered "auto" that is a "trailer"”

   • The owner of a hired or borrowed trailer is an insured while the trailer is used with your covered power unit, rather than only while connected to it.

     11 20

     “while the "trailer" is connected to another covered "auto" that is a power unit”

     12 23

     “while the "trailer" is being used: (1) With another covered "auto" that is a power unit”

   • The lessor of a leased auto is an insured except to the extent a written hold harmless agreement requires the lessor to hold you harmless, instead of losing insured status entirely under such an agreement.

     11 20

     “if the written agreement between the lessor and you does not require the lessor to hold you harmless and then only”

     12 23

     “but only to the extent required by such hold harmless agreement”

1 other edition date appears in one or two filings each, often carrier-specific versions: 02 23.

Where filings record what this form replaced, they name earlier edition 10 13 and other forms CA 23 20 10 13, LDDX-133612088. Only some filings record replacements.

• Edition in use: in the past 12 months, 36 companies filed the 12 23 edition and 10 companies filed 10 13.
• The latest edition, 09 27, has been filed by Insurance Services Office, Inc in 26 states since Aug 20, 2026. No carrier filings list it yet.
• CA 00 20 (Motor Carrier Coverage Form) is filed alongside it most often, in 255 of the same filings (88%).

Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Sep 2026, excluding withdrawn and rejected filings. One filing can cover several affiliated companies.

• Progressive GroupUses CA 23 30 in 1 filing
• Travelers GroupUses CA 23 30 in 62 filings
• Berkshire Hathaway GroupUses CA 23 30 in 1 filing
• Old Republic GroupUses CA 23 30 in 3 filings

• CA 00 20Motor Carrier Coverage Form255 filings
• CA 04 43Waiver of Transfer of Rights of Recovery Against Others to Us (Waiver of Subrogation) - Automatic When Required by Written Contract or Agreement218 filings
• CA 27 05Unmanned Aircraft Exclusion for General Liability Coverages211 filings
• CA 27 06Unmanned Aircraft Exclusion for General Liability Coverages - (Bodily Injury and Property Damage Liability Only)206 filings
• CA 00 01Business Auto Coverage Form203 filings
• CA 20 33Autos Leased, Hired, Rented or Borrowed with Drivers - Physical Damage Coverage192 filings
• CA 20 54Employee Hired Autos177 filings
• CA 28 03Abuse or Molestation Exclusion for Covered Autos Liability Exposure175 filings
• CA 99 05Business Interruption Coverage175 filings
• CA 00 25Auto Dealers Coverage Form174 filings