--- a/README	Wed May 17 12:15:08 2006 +0000
+++ b/README	Thu May 18 12:35:47 2006 +0000
@@ -77,7 +77,8 @@
 
 The IgH EtherCAT Master is free software; you can redistribute it
 and/or modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; version 2 of the License.
+as published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
 
 The IgH EtherCAT Master is distributed in the hope that it will be
 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -88,4 +89,13 @@
 along with the IgH EtherCAT Master; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
+The right to use EtherCAT Technology is granted and comes free of
+charge under condition of compatibility of product made by
+Licensee. People intending to distribute/sell products based on the
+code, have to sign an agreement to guarantee that products using
+software based on IgH EtherCAT master stay compatible with the actual
+EtherCAT specification (which are released themselves as an open
+standard) as the (only) precondition to have the right to use EtherCAT
+Technology, IP and trade marks.
+
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