CG 21 66 Exclusion – Volunteer Workers As Insureds

An Insurance Services Office (ISO) standard form. It removes volunteer workers as insureds and excludes injury or damage from aircraft, autos or watercraft operated by a volunteer worker for the insured's business. It also removes medical payments for injury to any insured.

1. 12 25 edition

   Dec 2025, compared with 12 19Latest edition

   • The broader volunteer worker auto, aircraft and watercraft exclusion now also applies when endorsement CG 24 55 is attached to the policy.

     12 19

     “CG 24 50 or CG 24 51 is attached”

     12 25

     “CG 24 51 or CG 24 55 is attached”

1 other edition date appears in one or two filings each, often carrier-specific versions: 10/1/2020.

Where filings record what this form replaced, they name earlier editions 06 15, 12 19 and other forms G 21 66. Only some filings record replacements.

• Edition in use: in the past 12 months, 35 companies filed the 12 19 edition and 12 companies filed 12 25.
• The newer 12 25 edition first appears Jul 12, 2024 and has been filed by 18 companies in 40 states so far.
• CG 21 37 (Exclusion - Employees and Volunteer Workers as Insureds) is filed alongside it most often, in 243 of the same filings (91%).

Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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.

• Berkshire Hathaway GroupUses CG 21 66 in 10 filings
• WR Berkley Corporation GroupUses CG 21 66 in 1 filing
• Fairfax Financial GroupUses CG 21 66 in 2 filings

• CG 21 37Exclusion - Employees and Volunteer Workers as Insureds243 filings
• CG 22 69Pharmacists196 filings
• CG 21 44Limitation of Coverage to Designated Premises, Project or Operation194 filings
• CG 21 06Exclusion - Access or Disclosure of Confidential or Personal Information and Data-Related Liability - with Limited Bodily Injury Exception193 filings
• CG 00 01Commercial General Liability Coverage Form190 filings
• CG 40 14Cannabis Exclusion186 filings
• CG 22 97Pharmacists – Broadened Coverage185 filings
• CG 40 16Cannabis Exclusion with Hemp and Lessors Risk Exceptions184 filings
• CG 40 15Cannabis Exclusion with Hemp Exception183 filings
• CG 20 11Additional Insured - Managers or Lessors of Premises181 filings