At each closing time, the licensee shall lock or cause to be locked each vehicle,
except those locked by the person bringing the vehicle to the valet parking service,
if a key thereto is available, and shall deposit or cause to be deposited the said
key with a responsible person at a safe and convenient place, to be delivered to the
person who parked the vehicle upon surrender of the parking ticket if one was given
to such person, otherwise upon proof that such person has the right to possess such
vehicle.
