Section 211. General provisions

No driver of a motor truck or motor bus
  shall drive such vehicle or be on duty for any period of time in  excess
  of  that  authorized  pursuant  to  regulation  of the commissioner. The
  commissioner is hereby authorized to promulgate  rules  and  regulations
  governing  the  hours  of  service  of drivers of motor trucks and motor
  buses. Such rules and regulations shall be no less protective of  public
  safety  than  the  rules  and  regulations  promulgated  by  the federal
  government with respect to hours of labor of operation of  motor  trucks
  and motor buses, provided, however, that with regard to drivers of motor
  buses  operated  exclusively in a town or county or operated by a public
  transportation authority operating exclusively within its jurisdictional
  area, the rules and regulations of the commissioner shall  provide  that
  no  driver  of  such  motor  buses  shall  drive  more than twelve hours
  following eight consecutive hours off duty and no driver of  such  motor
  buses  shall  drive for any period after having been on duty for fifteen
  hours following eight consecutive hours off duty  and  every  driver  of
  such  motor  buses shall have at least twenty-four consecutive hours off
  duty in every period of seven consecutive days and  in  no  event  shall
  such  a driver be on duty for more than seventy-five hours in any period
  of seven consecutive days.