Clarify what visibility must be declared.

Crell · Crell · commit 4ef4f17cec3c · 2025-05-31T01:51:50.000-05:00
diff --git a/spec.md b/spec.md
@@ -519,7 +519,7 @@ class Talker
 
 ### 4.3 Properties and Constants
 
-Visibility MUST be declared on all properties.
+Visibility MUST be declared on all properties.  If set-visibility is specified, then the general visibility MAY be omitted.
 
 Visibility MUST be declared on all constants.
 
