Add effective date. Clarify when a certificate is considered revoked

docs/BR.md

@@ -1424,6 +1424,8 @@ No stipulation.
 
 ### 4.9.5 Time within which CA must process the revocation request
 
+Prior to 2025-03-15, for Section 4.9.5 of these Requirements, the CA SHALL adhere to these Requirements or Version 2.1.1 of the Baseline Requirements for TLS Server Certificates. Effective 2025-03-12, the CA SHALL adhere to these Requirements.
+
 Within twenty-four (24) hours after receiving a Certificate Problem Report, the CA SHALL investigate the facts and circumstances related to the report and determine if it's "actionanable."
 
 A Certificate Problem Report is considered actionable if it includes:
@@ -1547,6 +1549,12 @@ Not applicable.
 
 Not applicable.
 
+### 4.9.17 Authoritative certificate status
+
+Effective 2025-03-15, for a certificate to be considered revoked:
+1. If the CA publishes a CRL, the CRL containing the certificate serial number MUST have been published to the Repository and be available for consumption for Relying Parties; and
+2. If the certificate contains a HTTP URL of the Issuing CA's OCSP responder, at least one (1) OCSP response containing a `certStatus` value of `revoked` MUST have been published to the Repository and be available for consumption for Relying Parties;
+
 ## 4.10 Certificate status services
 
 ### 4.10.1 Operational characteristics