Coverage description
An Insurance Services Office (ISO) standard form. It applies a motor carrier's auto liability coverage to the indemnity it assumes under Section F.4. of the Uniform Intermodal Interchange and Facilities Access Agreement, sets the limit for interchange equipment, and requires the insurer to send a certificate and 30 days' notice of cancellation to the Intermodal Association of North America.
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 assumed indemnity no longer includes cargo loss, damage or delay unrelated to a motor vehicle accident involving the motor carrier, other than cargo theft during the interchange period.
10 13
Not in this edition
11 20
“(other than cargo loss, damage, or delay unrelated to a commercial motor vehicle "accident"”
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 | 371 | 137 | 49 | Nov 2021 to Oct 2026 |
| 10 13Oct 2013 | 60 | 42 | 21 | Dec 2021 to Jun 2026 |
| 03 06Mar 2006 | 7 | 4 | 3 | Jun 2022 to Mar 2026 |
1 other edition date appears in one or two filings each, often carrier-specific versions: 11 00.
Where filings record what this form replaced, they name earlier editions 10 13, 03 06 and other forms UNKP-131348280. Only some filings record replacements.
What the filings show
- Edition in use: in the past 12 months, 52 companies filed the 11 20 edition and 4 companies filed 10 13.
- CA 20 01 (Lessor – Additional Insured and Loss Payee) is filed alongside it most often, in 281 of the same filings (64%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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 17, out of 66 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Berkshire Hathaway Group18 group companies filed it, led by National Liability and Fire Insurance Company and National Indemnity Company | 69 | 44 | 11 2010 1311 00 | Oct 14, 2026 |
| Amtrust Financial Services Group10 group companies filed it, led by Wesco Insurance Company and CorePointe Insurance Company | 43 | 41 | 11 20 | Oct 3, 2024 |
| Clear Blue Financial Group2 group companies filed it, led by Clear Blue Insurance Company and Rock Ridge Insurance Company | 41 | 35 | 11 20 | Jun 17, 2026 |
| OBS Holdings Group2 group companies filed it, led by Obsidian Insurance Company and Obsidian Pacific Insurance Company | 36 | 36 | 11 20 | Feb 3, 2023 |
| Nationwide Corporation Group13 group companies filed it, led by Allied Insurance Company of America and Nationwide Mutual Insurance Company | 31 | 8 | 11 2010 13 | Apr 7, 2026 |
| Triangle Insurance Company, Inc. | 23 | 21 | 11 2010 13 | Mar 11, 2025 |
| 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 Employers Insurance Company of Wausau and LM Insurance Corporation | 12 | 5 | 11 2010 13 | Jul 1, 2026 |
| MS & AD Insurance Group3 group companies filed it, led by Transverse Insurance Company and Mitsui Sumitomo Insurance Company of America | 12 | 5 | 11 2010 13 | Aug 27, 2025 |
How the largest insurers handle CA 23 17
Groups among the largest commercial auto insurers that filed CA 23 17 or their own version in the past five years.
- Progressive GroupUses CA 23 17 in 1 filing
- Travelers GroupUses CA 23 17 in 29 filings
- Berkshire Hathaway GroupUses CA 23 17 in 67 filings
- Liberty Mutual GroupUses CA 23 17 in 4 filings
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States
Number of filings that include CA 23 17 in each state, Oct 2021 to Oct 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- CA 20 01Lessor – Additional Insured and Loss Payee281 filings
- CA 20 54Employee Hired Autos266 filings
- CA 20 71Auto Loan/Lease Gap Coverage264 filings
- CA 04 43Waiver of Transfer of Rights of Recovery Against Others to Us (Waiver of Subrogation) – Automatic When Required by Written Contract or Agreement263 filings
- CA 00 01Business Auto Coverage Form261 filings
- CA 20 48Designated Insured for Covered Autos Liability Coverage256 filings
- CA 04 49Primary and Noncontributory – Other Insurance Condition251 filings
- CA 04 44Waiver of Transfer of Rights of Recovery Against Others to Us (Waiver of Subrogation)245 filings
- CA 23 05Wrong Delivery of Liquid Products240 filings
- CA 00 20Motor Carrier Coverage Form233 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Oct 14, 2026 | Berkshire Hathaway Homestate Insurance Companyand 1 more | TX | 11 20 | CORN-135125761 |
| Oct 1, 2026 | Berkshire Hathaway Homestate Insurance Companyand 1 more | IL | 11 20 | CORN-135105991 |
| Sep 10, 2026 | SECURA Insurance, A Mutual Companyand 1 more | IL | 11 20 | SEIC-135044227 |
| Sep 4, 2026 | Incline Casualty Company | SC | 11 20 | AIAD-135047572 |
| Aug 28, 2026 | Jet Insurance Company | SC | 11 20 | MRTN-134878222 |
| Aug 27, 2026 | Philadelphia Indemnity Insurance Company | NM | 11 20 | PHLX-135063316 |
| Aug 18, 2026 | Berkshire Hathaway Homestate Insurance Companyand 2 more | NE | 11 20 | CORN-135058401 |
| Aug 18, 2026 | Berkshire Hathaway Homestate Insurance Companyand 1 more | GA | 11 20 | CORN-135058758 |
| Jul 1, 2026 | Employers Insurance Company of Wausauand 5 more | CO | 11 20 | LBRC-135000006 |
| Jun 26, 2026 | Grange Insurance Association | CO | 11 20 | GRIA-135000193 |
| 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 |
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 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
- CA 99 10 Drive Other Car Coverage - Broadened Coverage For Named Individuals
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