Upon conviction of a violation of any provision of this Chapter, the violator shall be punished by a fine not exceeding five hundred dollars ($500.00), plus costs, or by imprisonment in the City or County Jail not exceeding ninety (90) days, or by both such fine and imprisonment; provided, that in any case wherein the penalty for an offense is fixed by a Statute of the State, the statutory penalty, and no other, shall be imposed for such offense, except that imprisonments may be in the City Prison or workhouse instead of the County Jail.