In case of shortage of supply, the Public Works Division reserves the right to give preference in the matter of furnishing service to customers, as in the judgment of its representatives shall be for the best interests of the City, from the standpoint of public convenience or necessity. [Ord. 962 Art. VIII, § 107, 1959; Code 1970 § 13.32.070; Code 1954 § 4-3.182.]