RewriteEngine on
RewriteCond %{HTTP_REQUEST} ^/c/portal/layout [NC]
RewriteCond %{QUERY_STRING} p_l_id=PUB\.1013\.1 [NC]
RewriteRule ^ - [F]

Didnt work but this did

<VirtualHost *:80>
    ServerAdmin jason.lebouef@critrade.com
    RewriteEngine on
    RewriteCond %{REQUEST_URI} ^/c/portal/layout [NC]
    RewriteCond %{QUERY_STRING} p_l_id=PUB\.1013 [NC]
    RewriteRule ^ - [F]
</VirtualHost>