Coverage description
A National Council on Compensation Insurance (NCCI) standard form. It extends the policy to work subject to the Longshore and Harbor Workers' Compensation Act in the states in its schedule, adds the Act to the policy's definition of workers compensation law and lifts the employers liability exclusion for that work.
Updated
What the form says
Key clauses from edition A, the latest revision, quoted as filed.
“This endorsement applies only to work subject to the Longshore and Harbor Workers’ Compensation Act in a state shown in the Schedule.”
WC 00 01 06 A
Which work the endorsement reaches. Coverage follows the state entered in the schedule. The policy treats that work as though the state were listed in Item 3.A, and the Act is added to the policy's definition of workers compensation law, so Part One pays the benefits the Act requires.
“exclusion 8, does not apply to work subject to the Longshore and Harbor Workers’ Compensation Act.”
WC 00 01 06 A
Employers liability is restored for that work. Part Two exclusion 8 of the policy removes employers liability for work under federal compensation laws. This sentence switches that exclusion off for work under this Act, so Part Two applies to it as well.
“This endorsement does not apply to work subject to the Defense Base Act, the Outer Continental Shelf Lands Act, or the Nonappropriated Fund Instrumentalities Act.”
WC 00 01 06 A
Which federal extensions are left out. Work under these three Acts is not picked up by this endorsement even though each draws on the Longshore Act. Each needs its own coverage endorsement.
“those non-F classification rates will be increased by the Longshore and Harbor Workers’ Compensation Act Coverage Percentage shown in the Schedule.”
WC 00 01 06 A
How non-F classifications are priced. Classification codes without the letter F are rated for work not ordinarily under the Act. When work in such a classification is subject to the Act, its rate goes up by the coverage percentage entered next to the state in the schedule.
How the form has changed
Filed copies carry revision A (Ed. 4-92), and no copy of the earlier NCCI edition with stored text has been filed, so there is nothing to compare.
Editions
Revision letters as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed | Document |
|---|---|---|---|---|---|
| ALatest | 138 | 116 | 15 | Dec 2021 to Nov 2026 | View PDF |
What the filings show
- Edition in use: in the past 12 months, 57 companies filed edition A.
- WC 00 03 13 (Waiver of Our Right to Recover From Others Endorsement) is filed alongside it most often, in 125 of the same filings (91%).
Data from admitted P&C filings with state insurance departments, submitted Nov 2021 to Nov 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 WC 00 01 06, out of 35 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Nationwide Corporation Group9 group companies filed it, led by AMCO Insurance Company and Crestbrook Insurance Company | 20 | 1 | A | Jun 30, 2026 |
| Brookfield Wealth Solutions Group4 group companies filed it, led by Argonaut Insurance Company and Argonaut-Midwest Insurance Company | 19 | 1 | A | Jun 4, 2026 |
| AXA Insurance Group5 group companies filed it, led by Greenwich Insurance Company and XL Insurance America, Inc. | 6 | 2 | A | Jun 23, 2026 |
| Acuity, A Mutual Insurance Company | 6 | 2 | A | Jul 1, 2026 |
| Tokio Marine Holdings Incorporated Group2 group companies filed it, led by Safety First Insurance Company and Safety National Casualty Corporation | 6 | 2 | A | May 14, 2025 |
| Chubb Limited Group15 group companies filed it, led by Chubb Indemnity Insurance Company and Chubb National Insurance Company | 5 | 4 | A | Sep 1, 2026 |
| Intact Financial Group3 group companies filed it, led by Atlantic Specialty Insurance Company and OBI America Insurance Company | 5 | 1 | A | Jun 24, 2026 |
| RLI Insurance GroupRLI Insurance Company | 5 | 1 | A | Aug 18, 2026 |
| Sompo Group2 group companies filed it, led by Sompo America Fire and Marine Insurance Company and Sompo America Insurance Company | 5 | 1 | A | Jun 15, 2026 |
| State Farm GroupState Farm Fire and Casualty Company | 5 | 1 | A | May 4, 2026 |
How the largest insurers handle WC 00 01 06
Groups among the largest workers compensation insurers that filed WC 00 01 06 or their own version in the past five years.
- Hartford Fire & CAS GroupUses WC 00 01 06 in 1 filing
- Travelers GroupFiles its own version: XC 99 0002 (00) Longshore and Harbor Workers’ Compensation Act Coverage Endorsement (40 states)
- Amtrust Financial Services GroupUses WC 00 01 06 in 1 filing
- Chubb Limited GroupUses WC 00 01 06 in 4 filings
States
Number of filings that include WC 00 01 06 in each state, Nov 2021 to Nov 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- WC 00 03 13Waiver of Our Right to Recover From Others Endorsement125 filings
- WC 00 03 08Partners, Officers and Others Exclusion Endorsement121 filings
- WC 00 03 11Voluntary Compensation and Employers Liability Coverage Endorsement121 filings
- WC 00 04 06Premium Discount Endorsement121 filings
- WC 00 04 22Terrorism Risk Insurance Program Reauthorization Act Disclosure Endorsement121 filings
- WC 00 03 05Joint Venture as Insured Endorsement120 filings
- WC 00 04 21Catastrophe (Other Than Certified Acts of Terrorism) Premium Endorsement119 filings
- WC 00 00 00Workers Compensation and Employers Liability Insurance Policy118 filings
- WC 00 03 01Alternate Employer Endorsement118 filings
- WC 00 03 04Insurance Company as Insured Endorsement117 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Nov 2, 2026 | AmFed Advantage Insurance Companyand 3 more | WA | A | GREY-135137891 |
| Sep 25, 2026 | AmFed Advantage Insurance Companyand 3 more | MI | A | GREY-135103500 |
| Sep 16, 2026 | ZNAT Insurance Company | CT | A | ZICO-135090521 |
| Sep 1, 2026 | ACE American Insurance Companyand 7 more | WY | A | ACEH-134835739 |
| Aug 18, 2026 | RLI Insurance Company | CO | A | RLSC-135057018 |
| Jul 1, 2026 | Acuity, A Mutual Insurance Company | CO | A | ACUT-134982793 |
| Jun 30, 2026 | American Casualty Company of Reading, Pennsylvaniaand 5 more | CO | A | CNAB-135003197 |
| Jun 30, 2026 | Crestbrook Insurance Companyand 1 more | CO | A | NWPP-135003409 |
| Jun 30, 2026 | National Casualty Company | CO | A | NWPP-135004216 |
| Jun 24, 2026 | Atlantic Specialty Insurance Companyand 2 more | CO | A | BEAC-134978198 |
| Jun 23, 2026 | Allmerica Financial Alliance Insurance Companyand 5 more | CO | A | HNVX-134968029 |
| Jun 23, 2026 | AXA XL Insurance Company Americasand 3 more | CO | A | XLAM-134996276 |
Most filed NCCI WC forms
- WC 00 00 01 Information Page
- WC 00 04 19 Part Five, Premium Amendatory Endorsement
- WC 00 00 00 Workers Compensation and Employers Liability Insurance Policy
- WC 00 04 21 Catastrophe (Other Than Certified Acts of Terrorism) Premium Endorsement
- WC 00 04 06 Premium Discount Endorsement
- WC 00 03 13 Waiver of Our Right to Recover From Others Endorsement
- WC 00 04 22 Terrorism Risk Insurance Program Reauthorization Act Disclosure Endorsement
- WC 00 03 08 Partners, Officers and Others Exclusion Endorsement
- WC 00 03 03 Employers Liability Coverage Endorsement
- WC 00 03 11 Voluntary Compensation and Employers Liability Coverage Endorsement
- WC 00 04 03 Experience Rating Modification Factor Endorsement
- WC 00 04 04 Pending Rate Change Endorsement