The purchase order module adds an extra payment method for Ubercart that allows customers on your site to check out using a PO number. You can restrict access to which users are allowed to checkout by purchase order with an access control permission called pay by purchase order. PO numbers are viewable at checkout and on all the order screens, and they are editable by administrators from the order edit screen.
The htmLawed module uses the htmLawed PHP library to restrict and purify HTML for security and compliance with web standards and admin policy. htmLawed is open-source, single-file, fast,highly customizable, well-documented.