Add normative notice to Sect. 1.2

Author: dlemire60

openc2-impl-https-v1.0.md

@@ -128,6 +128,9 @@ OpenC2 allows the application producing the commands to discover the set of capa
 This specification is provided under the [Non-Assertion](https://www.oasis-open.org/policies-guidelines/ipr#Non-Assertion-Mode) Mode of the OASIS IPR Policy, the mode chosen when the Technical Committee was established. For information on whether any patents have been disclosed that may be essential to implementing this specification, and any offers of patent licensing terms, please refer to the Intellectual Property Rights section of the TC's web page (https://www.oasis-open.org/committees/openc2/ipr.php).
 
 ## 1.2 Terminology
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+_This section is normative._
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 * **Action**: The task or activity to be performed (e.g., 'deny').
 * **Actuator**: The function performed by the Consumer that executes the Command (e.g., 'Stateless Packet Filtering').
 * **Command**: A Message defined by an action-target pair that is sent from a Producer and received by a Consumer.