All motor vehicles operated in accordance with the provisions of this chapter engaged
in transporting passengers for hire shall at all times be subject to inspection and
be maintained in a condition of mechanical fitness with respect to each element of
safety as is required by the laws of this state and all regulations as may be enacted
by the city council. The supervisor of the ground transportation bureau of the department
of safety and permits or the director of the department of utilities shall have the
power and authority to require inspections from time to time, other than those herein
prescribed, when same through reason and sound judgment are deemed necessary.