Board Thread:Support Requests - Getting Technical/@comment-24577221-20160116170626/@comment-303594-20160116171542

"The best I've found so far was to create a template with the explanatory stuff and stick that at the top of the page with the list of codes. Unfortunately, we're now finding that people are accidentally removing the tag referencing the template, removing the explanatory stuff completely."

Your best bet would be to set up an AbuseFilter that denies saving the page if that template is removed from that page. I'd be happy to write the filter if you ask staff to enable the extension at Special:Contact/general