CX 00 01 Commercial Excess Liability Coverage Form

An Insurance Services Office (ISO) standard form. Coverage form for commercial excess liability that pays ultimate net loss above the retained limit, following the terms of the controlling underlying insurance and never giving broader coverage than that insurance.

2 other edition dates appear in one or two filings each, often carrier-specific versions: 09 22, 09 08.

Where filings record what this form replaced, they name other forms BIC 00 01 05 11. Only some filings record replacements.

• Edition in use: in the past 12 months, 20 companies filed the 04 13 edition.
• CX 21 33 (Exclusion of Certified Acts of Terrorism) is filed alongside it most often, in 50 of the same filings (47%).

Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Sep 2026, excluding withdrawn and rejected filings.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

• CX 21 33Exclusion of Certified Acts of Terrorism50 filings
• CX 21 01Nuclear Energy Liability Exclusion Endorsement49 filings
• CX 21 30Cap on Losses From Certified Acts of Terrorism49 filings
• CX 21 02Total Pollution Exclusion47 filings
• CX 21 34Extended Reporting Period for Terrorism Coverage46 filings
• CX 21 45Exclusion of Certified Nuclear, Biological, Chemical or Radiological Acts of Terrorism; Cap on Losses From Certified Acts of Terrorism46 filings
• CX 21 05Exclusion – All Hazards in Connection with Designated Premises45 filings
• CX 21 36Exclusion of Punitive Damages Related to a Certified Act of Terrorism45 filings
• CXDS01Commercial Excess Liability Declarations45 filings
• CX 21 07Exclusion – Designated Work44 filings