Board Thread:General Coding Help/@comment-26966924-20160331181411/@comment-24473195-20160401090853

The MediaWiki manual pages should help (and those pages are whitelisted:


 * https://www.mediawiki.org/wiki/Manual:Interface/Sitenotice

You might have forgotten that all pages in mediawiki are case sensitive, it is MediaWiki:Sitenotice, not MediaWiki:SiteNotice.