Every person in whose name a vehicle is registered shall be responsible for any parking violation of the provisions of this code. It shall be no defense that the vehicle was parked illegally by another unless proof is presented that said vehicle has been stolen and has not been returned to the registered owner by the date of the violation. The registered owner of a vehicle is not responsible for any parking violation if proof is presented that said vehicle has been sold prior to the date of the violation and not reregistered, in which case the purchaser shall be responsible. [BC 6.02.710, amended by Ordinance No. 3327, 7/19/83; BC 6.02.710, repealed and replaced by Ordinance No. 4742, 10/2/18. Formerly 6.02.720]