on 6 december 2010, a new design was introduced containing the letters rks (republic of kosovo's initials) on a blue field, a two digit number corresponding to the districts of kosovo, the coat of arms of kosovo, a three-digit number and finally two serial letters. the three-digit number starts at 101 and the serial letters start at aa. the remaining plates bearing the old design issued under unmik will be replaced with the new once their registration is pending renewal. as of 26 december 2011, rks plates will be substituted with temporary serbian plates when crossing the contested border into serbia.