Index: share/man/man9/style.9
===================================================================
--- share/man/man9/style.9
+++ share/man/man9/style.9
@@ -103,6 +103,8 @@
 .Dq Li "Copyright"
 lines should only be added when making substantial changes to the file,
 not for trivial changes.
+Copyright text can not be modified in any way including whitespace unless
+the work has been completely rewritten.
 .Pp
 After any copyright and license comment, there is a blank line.
 Non-C/C++ source files follow the example above, while C/C++ source files