The tax imposed and levied by this article, if not paid when due, shall bear interest at the rate of six percent (6%) per annum from the due date of the return until paid.
If any hotel operator fails to make the return on any installment required by this article, or makes his return, but fails to remit in whole or in part the proper amount of tax, there shall be added to the amount of tax unpaid, from the date such tax should have been paid, a penalty in the amount of five percent (5%) of the tax for the first month, or fraction thereof, of delinquency and one percent (1%) of the tax for each succeeding month, or fraction thereof, of delinquency; provided, that if such failure is due to reasonable cause, then the taxing authority may waive in whole or in part these penalties.
(1960 Code 5-510)