Common law

“Law arising from tradition and judicial decisions rather than statutes passed by the legislature.

“A case in which the issues are determined by common law legal principles established by courts and tradition, as opposed to statutes.”

Common law action

” In Michigan, common law is in effect except where it has been modified or repealed by statute.” Emphasis mine.

SOURCE: A Journalist’s Guide to Covering Michigan State Courts pg 50
Michigan Supreme Court
Office of Public Information

2014 edition