diff --git a/acctz/acctz.proto b/acctz/acctz.proto
index 2491a7f..0649aac 100644
--- a/acctz/acctz.proto
+++ b/acctz/acctz.proto
@@ -289,10 +289,12 @@ message RecordResponse {
 }
 
 // RecordRequest, requests a starting point for records to be sent to the
-// caller. A tiemstamp of 0 indicates that the server should return all
-// records present to the client.
+// caller.
+// The receiver then can signal back to the sender periodic sync messages to
+// acknowledge received records.
+// The timestamp indicates the last processed Record at the caller.
 message RecordRequest {
   // The time when the system recorded this event represented as nanoseconds
-  // since the unix epoch (UTC).
+  // since the unix epoch.
   google.protobuf.Timestamp timestamp = 2;
 }