Registration is open for foreign car and motorcycle enthusiasts to enter in the third annual Nevada City Foreign Car Show, which takes place in June. The car show is a collaborative effort between the Sierra Sports Car Group, United Way of Nevada County and the Nevada City Chamber of Commerce, which announced the open registration jointly Thursday. Entry will be limited to 1980 and older vehicles, including vintage motorcycles. There will be a special class to allow cars of special interest to enter, such as race cars and exotics, such as a 2000 Lamborghini or 1997 Maserati. When the event takes …