(May 4, 2017, 11:27 AM EDT) -- SALT LAKE CITY — The Utah Supreme Court on April 3 unanimously held that an arrangement between Tesla Inc., the electric automaker, and Tesla Motors UT Inc., a wholly owned subsidiary, amounted to an illegal automobile franchise under state law prohibiting auto manufacturers from owning dealerships (Tesla Motors UT Inc. v. Utah Tax Commission, et al., No. 20150792, Utah Sup., 2017 Utah LEXIS 54)....