User blog:Najevi/Special:MyPage/monaco.css applies even for a Non-Custom Monaco skin

From time to time I see an experienced wikian write that your personal monaco.css (Special:MyPage/monaco.css) will only affect a site's skin if the Monaco Custom skin has been selected by the site's admin. Regardless of whether a site's admin has specified: a user's personal monaco.css will layer on top of (i.e. take precedence over) any Monaco skin style at that wiki.
 * This is fiction.
 * 1) Default
 * 2) Monaco Custom
 * 3) Monaco Slate
 * 4) ... or any of the other preset Monaco skins

This has been verified using both non-sysop and sysop user accounts at a pristine test wiki.