diff --git a/principles/fp-002-format.md b/principles/fp-002-format.md
index 5929898ee..a2a47c2bf 100644
--- a/principles/fp-002-format.md
+++ b/principles/fp-002-format.md
@@ -7,7 +7,7 @@ GO TO: [Recommendations/Requirements](#recommendations-and-requirements) |
 
 ## Summary
 
-The ontology is made available in a common formal language in an accepted concrete syntax.
+The ontology MUST be made available in a common formal language in an accepted concrete syntax.
 
 ## Purpose