diff --git a/src/main/protobuf/invocation_policy.proto b/src/main/protobuf/invocation_policy.proto
index 0d687f8..f54a0f5 100644
--- a/src/main/protobuf/invocation_policy.proto
+++ b/src/main/protobuf/invocation_policy.proto
@@ -61,7 +61,7 @@
 
 message SetValue {
   // Use this value for the specified flag, overriding any default or user-set
-  // value (unless append is set to true for repeatable flags).
+  // value (unless behavior = APPEND for repeatable flags).
   //
   // This field is repeated for repeatable flags. It is an error to set
   // multiple values for a flag that is not actually a repeatable flag.
@@ -69,7 +69,7 @@
   //
   // If the flag allows multiple values, all of its values are replaced with the
   // value or values from the policy (i.e., no diffing or merging is performed),
-  // unless the append field (see below) is set to true.
+  // unless behavior = APPEND (see below).
   //
   // Note that some flags are tricky. For example, some flags look like boolean
   // flags, but are actually Void expansion flags that expand into other flags.
@@ -121,9 +121,6 @@
 
   // Defines how invocation policy should interact with user settings for the
   // same flag.
-  // For the time being, it coexists with overridable and append with duplicate
-  // semantics.Please fill both of the values as we migrate to use behavior
-  // only.
   optional Behavior behavior = 4;
 }