Coverage description
An Insurance Services Office (ISO) standard form. The conditions that apply to every coverage part on a commercial policy: how either side can cancel and how much notice the insurer must give (10 days for nonpayment, 30 days otherwise), who can change the policy, the insurer's right to audit records and inspect, and who pays the premium.
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 11 98Nov 1998Latest | 1,034 | 249 | 49 | Nov 2021 to Oct 2026 |
9 other edition dates appear in one or two filings each, often carrier-specific versions: 05 26, 01 24, 11 17, 11 09, 09 08, 03 06, 09 98, 11 85, 2026.1.
Where filings record what this form replaced, they name other forms M-4600A. Only some filings record replacements.
What the filings show
- Edition in use: in the past 12 months, 107 companies filed the 11 98 edition.
- IL 00 21 (Nuclear Energy Liability Exclusion Endorsement (Broad Form)) is filed alongside it most often, in 454 of the same filings (44%).
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Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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 IL 00 17, out of 111 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Markel Corporation Group4 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company | 171 | 44 | 11 9803 0611 09 | Oct 22, 2026 |
| Liberty Mutual Group13 group companies filed it, led by American Fire and Casualty Company and Ohio Security Insurance Company | 71 | 45 | 11 98 | Jun 30, 2026 |
| ACP Insurance Mgmt LLC GroupAccelerant National Insurance Company | 47 | 19 | 11 98 | Dec 8, 2025 |
| Nationwide Corporation Group13 group companies filed it, led by Nationwide Mutual Insurance Company and Allied Insurance Company of America | 43 | 12 | 11 98 | Jun 30, 2026 |
| Munich RE Group2 group companies filed it, led by Next Insurance US Company and American Alternative Insurance Corporation | 38 | 34 | 11 98 | Jul 31, 2026 |
| WCF Mutual Insurance Company Group2 group companies filed it, led by Associated Indemnity Corporation and WCF National Insurance Company | 34 | 19 | 11 98 | Sep 25, 2026 |
| Amtrust Financial Services Group10 group companies filed it, led by First Nonprofit Insurance Company and CorePointe Insurance Company | 29 | 10 | 11 98 | Apr 10, 2025 |
| Great Plains Casualty, Inc. | 28 | 23 | 11 98 | Sep 24, 2026 |
| Berkshire Hathaway Group17 group companies filed it, led by GEICO General Insurance Company and GEICO Marine Insurance Company | 25 | 15 | 11 98 | Aug 18, 2026 |
| MS & AD Insurance Group3 group companies filed it, led by Transverse Insurance Company and Mitsui Sumitomo Insurance Company of America | 22 | 6 | 11 98 | Sep 4, 2025 |
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States
Number of filings that include IL 00 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.
- IL 00 21Nuclear Energy Liability Exclusion Endorsement (Broad Form)454 filings
- IL 00 03Calculation of Premium449 filings
- IL 12 01Policy Changes353 filings
- IL 09 85Disclosure Pursuant to Terrorism Risk Insurance Act307 filings
- IL 09 35Exclusion of Certain Computer- Related Losses222 filings
- CA 99 44Loss Payable Clause221 filings
- CA 20 48Designated Insured for Covered Autos Liability Coverage210 filings
- CA 04 44Waiver of Transfer of Rights of Recovery Against Others to Us (Waiver of Subrogation)208 filings
- CA 23 94Silica or Silica- Related Dust Exclusion for Covered Autos Exposure207 filings
- CA 00 01Business Auto Coverage Form204 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Oct 22, 2026 | The Guarantee Company of North America USA | CA | 11 98 | SPRO-G134931114 |
| Oct 22, 2026 | The Guarantee Company of North America USA | CA | 11 98 | SPRO-G135017985 |
| Oct 22, 2026 | State National Insurance Company, Inc. | CO | 11 98 | STNA-135128706 |
| Oct 16, 2026 | MIC General Insurance Corporation | NJ | 11 98 | GMMX-135128490 |
| Oct 14, 2026 | Century-National Insurance Company | GA | 11 98 | GMMX-135119885 |
| Oct 1, 2026 | New Hampshire Insurance Company | HI | 11 98 | AGNY-135108255 |
| Sep 25, 2026 | Associated Indemnity Corporation | UT | 11 98 | ADWC-135104118 |
| Sep 24, 2026 | Great Plains Casualty, Inc. | CT | 11 98 | MRTN-135102056 |
| Sep 4, 2026 | Southern Trust Insurance Company | GA | 11 98 | STTR-135079411 |
| Sep 1, 2026 | MIC General Insurance Corporation | NV | 11 98 | GMMX-135075522 |
| Sep 1, 2026 | Great Plains Casualty, Inc. | WA | 11 98 | MRTN-135074626 |
| Aug 28, 2026 | Jet Insurance Company | SC | 11 98 | MRTN-134878222 |
Most filed ISO IL forms
- IL 12 01 Policy Changes
- IL 00 21 Nuclear Energy Liability Exclusion Endorsement (Broad Form)
- IL DS 00 Common Policy Declarations
- IL 09 85 Disclosure Pursuant to Terrorism Risk Insurance Act
- IL 00 03 Calculation of Premium
- IL 09 52 Cap On Losses From Certified Acts Of Terrorism
- IL 09 53 Exclusion of Certified Acts of Terrorism
- IL 09 98 Disclosure of Premium Through End of Year For Certified Acts of Terrorism Coverage (Pursuant to Terrorism Risk Insurance Act)
- IL 09 35 Exclusion of Certain Computer-Related Losses
- IL 09 99 Disclosure of Premium and Estimated Premium for Certified Acts of Terrorism Coverage (Pursuant to Terrorism Risk Insurance Act)
- IL 09 17 Resident Agent Countersignature Endorsement
- IL 02 70 California Changes - Cancellation And Nonrenewal
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