diff --git a/specification.json b/specification.json
index 787f708a..12662d58 100644
--- a/specification.json
+++ b/specification.json
@@ -299,6 +299,13 @@
             "RFC 2119 keyword": "MUST",
             "children": []
         },
+        {
+            "id": "Requirement 3.1.3",
+            "machine_id": "requirement_3_1_3",
+            "content": "The evaluation context MUST support fetching the custom fields by key and also fetching all key value pairs.",
+            "RFC 2119 keyword": "MUST",
+            "children": []
+        },
         {
             "id": "Requirement 3.2.1",
             "machine_id": "requirement_3_2_1",
diff --git a/specification/sections/03-evaluation-context.md b/specification/sections/03-evaluation-context.md
index c488b64c..045f986d 100644
--- a/specification/sections/03-evaluation-context.md
+++ b/specification/sections/03-evaluation-context.md
@@ -32,6 +32,10 @@ The targeting key uniquely identifies the subject (end-user, or client service)
 
 see: [structure](../types.md#structure), [datetime](../types.md#datetime)
 
+#### Requirement 3.1.3
+
+> The evaluation context **MUST** support fetching the custom fields by key and also fetching all key value pairs.
+
 ### Merging Context
 
 #### Requirement 3.2.1