Thought I'd post this for those who don't know what their local rules are:
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States that only require a rear license plate are:
Alabama, Arizona, Arkansas, Delaware, Florida, Georgia, Guam, Indiana, Kansas, Kentucky, Louisiana, Michigan, Mississippi, New Mexico, North Carolina, Oklahoma, Pennsylvania, Puerto Rico, South Carolina, Tennessee, Virgin Islands, West Virginia, Alberta, Quebec, Manitoba (New plates are front/back in 1997), Northwest Territories, Prince Edward Island, Yukon Territory
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Stupid wisconsin..