### 1.6.4 Conventions
Terms not otherwise defined in these Requirements are as defined in the CA's applicable agreements, user manuals, Certificate Policies, and Certification Practice Statements.
The key words \"MUST", "MUST NOT", \"REQUIRED\", \"SHALL\", \"SHALL NOT\", \"SHOULD\", \"SHOULD NOT\", \"RECOMMENDED\", \"MAY\", and \"OPTIONAL\" in these Requirements are used in accordance with RFC 2119.
By convention, this document omits time and timezones when listing effective requirements such as dates. Except when explicitly specified, the associated time with a date shall be 00:00:00 UTC.