Chapter 3. Passenger Special Plates Issued by Quincy Distribution Center: B. Plate Type: The plate begins with " SN " and has four numbers or combination of number and letters. C. Plate Fees: The biennial plate fee is $100 ($60 registration fee + $40 special plate fee). ATLAS maintains the plate number preceded by the code " SN " . D. Expiration Date: Massachusetts Animal Coalition plates expire every two years on a staggered basis determined by the last number of the registration. Here is a link to the Special Plate online page for MAC Plates. 08/12https://secure.rmv.state.ma.us/SpecialPlates/intro.aspx