How To Show “Allowed HTML Tags” Notice for Comments in Thesis Theme

function my_allowed_tags() {
$allowed_tags = '' . "\n";
$allowed_tags .= 'You may use these HTML tags and attributes: ';
$allowed_tags .= allowed_tags() . "\n";
$allowed_tags .= '' . "\n";
echo $allowed_tags;
}

add_action('thesis_hook_after_comment_box','my_allowed_tags');


.custom #commentform span.allowed span {
font-size: 1.0em;
line-height: 1.5em;
padding: 0.25em 0.5em;
}
.custom #commentform span.allowed {
display: block;
color: #807e70;
background: #f9f7e4;
border-style: none;
margin-bottom: .75em;
}