The new rule pertains to file permissions.
Articles 23-26 deal with permissions to read prohibited books; these are given by the bishop in particular cases, and in the ordinary course by the Congregation of the Index.
One of the first things you can learn there is how to change the permissions on your Theme folder in the WordPress installation so that the theme editor works for you.
You would need to have Admin-level access to your web server in order to do that, however, so be sure to read thoroughly about what you need to do before just changing permissions.
Trusted Website Access Permissions - Some large websites that Facebook knows aren't up to nefarious means, such as Bing.com, are granted full access of all the information on everyone's Facebook page.