diff --git a/enforcement-case-studies.tex b/enforcement-case-studies.tex
index bf34262..0af889b 100644
--- a/enforcement-case-studies.tex
+++ b/enforcement-case-studies.tex
@@ -2,8 +2,20 @@
 %
 % Copyright (C) 2003, 2004 Free Software Foundation, Inc.
 
-% Verbatim copying and distribution of this entire document is permitted in
-% any medium, provided this notice is preserved.
+% License: CC-By-SA-4.0
+
+% The copyright holders hereby grant the freedom to copy, modify, convey,
+% Adapt, and/or redistribute this work under the terms of the Creative
+% Commons Attribution Share Alike 4.0 International License.
+
+% This text is distributed in the hope that it will be useful, but
+% WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+% You should have received a copy of the license with this document in
+% a file called 'CC-By-SA-4.0.txt'.  If not, please visit
+% https://creativecommons.org/licenses/by-sa/4.0/legalcode to receive
+% the license text.
 
 \documentclass[11pt]{book}
 % FILTER_PS:  \input{generate-ps-file}
@@ -84,8 +96,10 @@ Copyright \copyright{} 2003, 2004 \hspace{.2in} Free Software Foundation, Inc.
 
 \vspace{.3in}
 
-Verbatim copying and distribution of this entire document is permitted in
-any medium, provided this notice is preserved.
+The copyright holders hereby grant the freedom to copy, modify, convey,
+Adapt, and/or redistribute this work under the terms of the Creative Commons
+Attribution Share Alike 4.0 International License.  A copy of that license is
+available at \verb=https://creativecommons.org/licenses/by-sa/4.0/legalcode=.
 }
 
 \end{titlepage}