The bureau shall establish a toll-free telephone number which shall be operational Monday through Saturday between the hours of 8:00 A.M. and 10:00 P.M. and operational on Sundays between the hours of 8:00 A.M. and 6:00 P.M. for purposes of responding to inquiries as described in this part from licensed dealers; provided, however, that such telephone service established by the bureau shall not be operational on Christmas Day. The bureau shall employ and train such personnel as are necessary to administer expeditiously the provisions of this Code section.