All taxes imposed by this chapter remaining unpaid after they have become due shall bear interest, in addition to the amount of the unpaid tax, at the rate of six percent per year, and the persons upon whom such taxes are imposed shall be further liable to a penalty of one-half of one percent of the amount of the unpaid tax for each month or fraction of a month for the first six months of nonpayment.
(Ord. 34-66. Passed 11-30-66.)