diff --git a/index.html b/index.html
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@@ -668,6 +668,18 @@ <h4>OAuth 2.0</h4>
       </section>
 
     </section>
+    <section>
+      <h3>Service Instances</h3>
+      <p>
+Service configuration is determined by administrators on per instance basis.
+Instance configuration can include, but is not limited to, credential format, key options, credential status mechanisms, and/or credential templates.
+Administrators are expected to configure service instances such that `options` included in client requests cannot result in incorrect action or problematic responses by the service.
+      </p>
+      <p>
+A coordinator instance can have access to multiple service instances in order to support different use cases.
+Runtime discovery of service instance configuration is not supported by the VC API as services are expected to be known by the coordinator at the time of coordinator deployment.
+      </p>
+    </section>
     <section>
       <h3>Options</h3>
       <p>