citation-style-language/styles — pull request #1213 by fbennett (2014-10-29 01:11:12+00:00)
Title: Render full title of first-reference legal cases

As far as I can tell, the first reference to a case should use the full title. It works a little differently in MLZ, where form="short" on legal types ignores the shortTitle value. That design (in MLZ) is debatable; but for official Zotero and other clients, the full title is definitely correct. I think.