An upfitter is
|“||a person that modifies a motor vehicle after it was manufactured by installing automated technology in that motor vehicle to convert it to an automated vehicle. Upfitter includes a subcomponent system producer recognized by the secretary of state that develops or produces automated technology.||”|
- Mich. Public Acts of 2013, Act No. 231, §2b.(5) (Dec. 20, 2013) (full-text).