CA/Browser Forum
Home » All CA/Browser Forum Posts » Ballot 75 – NameConstraints Criticality Flag

Ballot 75 – NameConstraints Criticality Flag

Ballot 75 – NameConstraints Criticality Flag (Passed)

Motion

Kathleen Wilson made the following motion, and Steve Roylance and Adam Langley endorsed it.

Motion begins

Effective immediately

Erratum begins

Delete the following text from the “Subordinate CA Certificate” section of both the Baseline Requirements Appendix B and EV Guidelines Appendix B:

“All other fields and extensions MUST be set in accordance to RFC 5280.”

AND replace it with the following:

“F. nameConstraints (optional).

If present, this extension SHOULD be marked critical*.

All other fields and extensions MUST be set in accordance to RFC 5280.

  • Non-critical Name Constraints are an exception to RFC 5280 that MAY be used until the Name Constraints extension is supported by Application Software Suppliers whose software is used by a substantial portion of Relying Parties worldwide.”

Erratum ends

The ballot review period comes into effect at 21:00 UTC on May 25, 2012 and will close at 21:00 UTC on June 1, 2012. Unless the motion is withdrawn during the review period, the voting period will start immediately thereafter and will close at 21:00 UTC on June 8, 2012. Votes must be cast by “reply all” to this email.

A vote in favor of the motion must indicate a clear ‘yes’ in the response. A vote against must indicate a clear ‘no’ in the response. A vote to abstain must indicate a clear ‘abstain’ in the response. Unclear responses will not be counted. The latest vote received from any representative of a voting member before the close of the voting period will be counted.

Motion ends

Latest releases
Server Certificate Requirements
SC098: Process RFC 8657 CAA Parameters - Jun 16, 2026

Code Signing Requirements
v3.8 - Aug 5, 2024

What’s Changed CSC-25: Import EV Guidelines to CS Baseline Requirements by @dzacharo in https://github.com/cabforum/code-signing/pull/38 Full Changelog: https://github.com/cabforum/code-signing/compare/v3.7...v3.8

S/MIME Requirements
v1.0.15 - Ballot SMC017v2 - Jul 30, 2026

This ballot increases the minimum RSA key size for Root and Subordinate CA certificates in the S/MIME BRs from 2048 to 4096 bits for keys created after September 15, 2026, while retaining the 2048-bit minimum for Subscriber certificates. The ballot further requires that by September 15, 2027, CAs SHALL NOT issue Subscriber certificates from any Sub-CA whose RSA key modulus is less than 3072 bits, effectively sunsetting issuance from legacy 2048-bit Sub-CAs. The ballot also includes minor typographic corrections. This ballot is proposed by Martijn Katerbarg (Sectigo) and endorsed by Ben Wilson (Mozilla) and Stephen Davidson (DigiCert)

Network and Certificate System Security Requirements
Version 2.0.5 (Ballot NS-008) - Jul 9, 2025

Edit this page
The Certification Authority Browser Forum (CA/Browser Forum) is a voluntary gathering of Certificate Issuers and suppliers of Internet browser software and other applications that use certificates (Certificate Consumers).