Coverage description
An Insurance Services Office (ISO) standard form. It extends liability and, if applicable, auto medical payments, uninsured motorists and personal injury protection coverage to scheduled trailers used to haul agricultural produce during the period of operation shown, but not to trailers used for livestock or outside farming or ranching.
How the form has changed
1 change across 1 revision, newest first. Each edition is compared with the one before it, using wording from filed copies.
11 20 edition
Nov 2020, compared with 10 13Latest editionThe trailers covered are now those with a gross vehicle weight rating over 3,000 pounds instead of a load capacity over 2,000 pounds.
10 13
“with a load capacity exceeding 2,000 pounds”
11 20
“with a Gross Vehicle Weight Rating exceeding 3,000 pounds”
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 11 20Nov 2020Latest | 150 | 114 | 16 | Nov 2021 to Sep 2026 |
| 10 13Oct 2013 | 50 | 36 | 11 | Dec 2021 to Jul 2026 |
| 11 10Nov 2010 | 6 | 3 | 1 | Jun 2023 to Jul 2025 |
| 10 01Oct 2001 | 6 | 4 | 3 | Jun 2022 to Jun 2025 |
1 other edition date appears in one or two filings each, often carrier-specific versions: 11/01/2020.
Where filings record what this form replaced, they name earlier edition 10 13 and other forms N/A. Only some filings record replacements.
What the filings show
- Edition in use: in the past 12 months, 39 companies filed the 11 20 edition and 3 companies filed 10 13.
- CA 20 15 (Mobile Equipment) is filed alongside it most often, in 205 of the same filings (97%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Sep 2026, excluding withdrawn and rejected filings.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.
Carriers filing this form
The 10 carrier groups with the most filings that include CA 23 24, out of 58 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Nationwide Corporation Group13 group companies filed it, led by Allied Insurance Company of America and Nationwide Mutual Insurance Company | 29 | 8 | 11 2010 13 | Apr 7, 2026 |
| Arch Insurance Group3 group companies filed it, led by Arch Insurance Company and Arch Indemnity Insurance Company | 13 | 2 | 11 20 | Apr 8, 2026 |
| OLD Republic Group4 group companies filed it, led by BITCO General Insurance Corporation and BITCO National Insurance Company | 13 | 1 | 11 20 | May 11, 2026 |
| Liberty Mutual Group7 group companies filed it, led by State Automobile Mutual Insurance Company and Employers Insurance Company of Wausau | 11 | 1 | 10 1311 20 | Jun 17, 2026 |
| Scor GroupGeneral Security National Insurance Company | 10 | 1 | 11 20 | Jun 9, 2026 |
| Tokio Marine Holdings Incorporated Group2 group companies filed it, led by Safety National Casualty Corporation and Philadelphia Indemnity Insurance Company | 10 | 6 | 11 2010 13 | Aug 27, 2026 |
| Clear Blue Financial Group2 group companies filed it, led by Clear Blue Insurance Company and Rock Ridge Insurance Company | 8 | 2 | 11 2011 10 | Oct 29, 2025 |
| Markel Corporation Group3 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company | 8 | 4 | 11 2010 13 | Jun 24, 2024 |
| Hastings Mutual Insurance Company | 7 | 4 | 11 2010 13 | Oct 7, 2025 |
| Alliance Insurance GroupFarmers Alliance Mutual Insurance Company | 6 | 1 | 10 1311 20 | May 19, 2026 |
How the largest insurers handle CA 23 24
Groups among the largest commercial auto insurers that filed CA 23 24 or their own version in the past five years.
- Progressive GroupUses CA 23 24 in 2 filings
- Berkshire Hathaway GroupUses CA 23 24 in 1 filing
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States
Number of filings that include CA 23 24 in each state, Oct 2021 to Sep 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- CA 20 15Mobile Equipment205 filings
- CA 00 01Business Auto Coverage Form202 filings
- CA 20 01Lessor - Additional Insured and Loss Payee198 filings
- CA 20 71Auto Loan/Lease Gap Coverage196 filings
- CA 20 54Employee Hired Autos195 filings
- CA 20 33Autos Leased, Hired, Rented or Borrowed with Drivers - Physical Damage Coverage192 filings
- CA 20 19Repossessed Autos185 filings
- CA 99 14Fire, Fire and Theft, Fire, Theft and Windstorm and Limited Specified Causes of Loss Coverages184 filings
- CA 99 28Stated Amount Insurance183 filings
- CA 20 78Physical Damage Coverage - Autos Held for Sale by Non-Dealers182 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Sep 10, 2026 | SECURA Insurance, A Mutual Companyand 1 more | IL | 11 20 | SEIC-135044227 |
| Aug 28, 2026 | Jet Insurance Company | SC | 11 20 | MRTN-134878222 |
| Aug 27, 2026 | Philadelphia Indemnity Insurance Company | NM | 11 20 | PHLX-135063316 |
| Jul 8, 2026 | Colorado Farm Bureau Insurance Company | CO | 10 13 | SFBC-135011078 |
| Jun 25, 2026 | Selective Insurance Company of Americaand 3 more | CO | 11 20 | SELC-134998854 |
| Jun 24, 2026 | Great American Alliance Insurance Companyand 3 more | CO | 11 20 | GACX-134993563 |
| Jun 19, 2026 | Addison Insurance Companyand 1 more | CO | 11 20 | UNFG-134905846 |
| Jun 18, 2026 | Sompo America Fire and Marine Insurance Companyand 1 more | CO | 11 20 | SMPJ-134972831 |
| Jun 17, 2026 | State Automobile Mutual Insurance Company | CO | 10 13 | STAT-134983292 |
| Jun 17, 2026 | State Automobile Mutual Insurance Company | CO | 10 13 | STAT-134983865 |
| Jun 9, 2026 | General Security National Insurance Company | CO | 11 20 | PERR-134978283 |
| Jun 9, 2026 | General Security National Insurance Company | CO | 11 20 | PERR-134978297 |
Most filed ISO CA forms
- CA DS 03 Business Auto Declarations
- CA DS 21 Motor Carrier Declarations
- CA 00 01 Business Auto Coverage Form
- CA 28 03 Abuse Or Molestation Exclusion For Covered Autos Liability Exposure
- CA 23 17 Truckers - Uniform Intermodal Interchange Endorsement Form UIIE - 1
- CA 04 43 Waiver Of Transfer Of Rights Of Recovery Against Others To Us (Waiver Of Subrogation) - Automatic When Required By Written Contract Or Agreement
- CA 04 44 Waiver Of Transfer Of Rights Of Recovery Against Others To Us (Waiver Of Subrogation)
- CA 04 49 Primary and Noncontributory - Other Insurance Condition
- CA 20 01 Lessor - Additional Insured And Loss Payee
- CA 20 48 Designated Insured For Covered Autos Liability Coverage
- CA 00 20 Motor Carrier Coverage Form
- CA 20 71 Auto Loan/Lease Gap Coverage
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