Assuming that what's described applies to the most recent releases. You could also argue that this disclaimer is old enough to be deleted.
Index: faq/pf/nat.html =================================================================== RCS file: /cvs/www/faq/pf/nat.html,v retrieving revision 1.54 diff -u -p -r1.54 nat.html --- faq/pf/nat.html 2 Jul 2015 05:49:05 -0000 1.54 +++ faq/pf/nat.html 25 Sep 2015 23:31:27 -0000 @@ -165,8 +165,8 @@ in the default install. Remove the <tt># forwarding will be enabled when the machine is rebooted. <h2 id="config">Configuring NAT</h2> -<font color="#ff0000">NOTE:</font> This information is for OpenBSD 4.7. -NAT configuration was significantly different in earlier versions. +<font color="#ff0000">NOTE:</font> This information is for OpenBSD 4.7 and +later. NAT configuration was significantly different in earlier versions. <p> NAT is specified as an optional <tt>nat-to</tt> parameter to an
