"not" встроено в код /admin/functions.php см. строка 1994
// ###################### Start getforumrules #######################
function getforumrules($foruminfo,$permissions) {
// array of foruminfo and permissions for this forum
global $offtext,$ontext,$forumrules,$session;
$bbcodeon = iif($foruminfo[\'allowbbcode\'], $ontext,$offtext);
$imgcodeon = iif($foruminfo[\'allowimages\'], $ontext,$offtext);
$htmlcodeon = iif($foruminfo[\'allowhtml\'], $ontext,$offtext);
$smilieson = iif($foruminfo[\'allowsmilies\'], $ontext,$offtext);
$notword = \'not\';
$rules[\'postnew\'] = iif($permissions[\'canpostnew\'],\'\', $notword);
$rules[\'postreply\'] = iif($permissions[\'canreplyown\'] or $permissions[\'canreplyothers\'],\'\', $notword);
$rules[\'edit\'] = iif($permissions[\'caneditpost\'],\'\', $notword);
$rules[\'attachment\'] = iif($permissions[\'canpostattachment\'] and ($permissions[\'canpostnew\'] or $permissions[\'canreplyown\'] or $permissions[\'canreplyothers\']),\'\', $notword);
eval("\\$forumrules = \\"".gettemplate(\'forumrules\')."\\";");
}