The commissioner may adopt and enforce rules regulating the sanitation and physical requirements of stables, livestock auction buildings or other buildings used for the housing of domestic animals for the purpose of preventing the spread of infection and contagion among such animals and may provide for the inspection and examination of such stables and buildings. The commissioner may adopt and enforce rules concerning the equipment for and the method of the sanitary production of milk and may provide for the examination and scoring of dairies in accordance with such rules. He may also prescribe such rules as may be necessary for disinfecting and cleaning premises, buildings, railway cars, boats and other objects, from or by means of which infection or contagion of animals may be spread or conveyed. Vehicles used for the transportation of livestock shall be cleaned and disinfected at least weekly, or as otherwise directed by the commissioner, with a disinfectant approved by the commissioner. Vehicles used by a farmer in transporting his own livestock need not be cleaned and disinfected as prescribed by the preceding sentence unless directed by the commissioner.