diff --git a/docs/file-formats/kmx-plus-file-format.md b/docs/file-formats/kmx-plus-file-format.md
index a7b7e190a6..680f3675b9 100644
--- a/docs/file-formats/kmx-plus-file-format.md
+++ b/docs/file-formats/kmx-plus-file-format.md
@@ -35,7 +35,9 @@ Draft spec PR: <https://github.com/unicode-org/cldr/pull/1847>
 - Other than the `sect` table itself, the rest of the sections follow in binary
   order in the file.  In other words, the binary ordering of the section
   identifiers determines the order of the file layout.
-- All sections other than the `sect` table are optional
+- All sections other than the `sect` table are optional for the file 
+  format to be valid, however, a valid keyboard will need most or 
+  all of the sections present to be usable.
 
 ### C7043.2.1 `sect`—Section Table of contents