Section 250-153-7 - VEHICLE IDENTIFICATION DEVICESA. The permit number issued by the Secretary of State shall be legibly painted preceded by the letter "J" on both sides of each vehicle and displayed in letters and figures in sharp color contrast to the background and be of such size, shape and color as to be readily legible, during daylight hours, from a distance of 50 feet while the vehicle is not in motion, and such display shall be kept and maintained in such a manner as to remain so legible. Nine passenger or less automobiles, as well as vehicles displaying an ICC (FMCSA Federal Motor Carrier Safety Administration) M.C. or DOT number, are exempted from this Section.B. The Secretary may at any time suspend or revoke the authority issued to any for-hire motor carrier, as heretofore provided for lack of insurance, failure to appear in court, or failure to meet fuel tax requirements.29- 250 C.M.R. ch. 153, § 7