This is a workaround for a continued problem in phpBB: [ticket](http://tracker.phpbb.com/browse/PHPBB3-12285) This would make our extension look right but any other extensions would still be "broken".

If the ticket gets solved, there'd be no need for this event/function, and no need to request an event in ucp_register.php. All we'd need to do is move the 'S_BOARDRULES_AT_REGISTRATION' var below up into the page header function above.

That is what I'd prefer, but it's contingent upon whether the dev team can or will address the issue in the ticket.