The duty of carrying out §§ 105-6 to 105-8, insofar as they relate to motor vehicles, the property, or under the control, of the State, shall be vested in the comptroller, and, insofar as they relate to the several counties, shall be vested in the respective county councils, and insofar as they relate to independent boards and commissions having charge of their own funds shall be vested in the respective boards or commissions.