If any tax imposed by this subchapter is not paid within the time herein specified for the payment, or an extension thereof, there shall be added thereto a specific penalty equal to 10% of the amount remaining unpaid. The amount of tax not timely paid, together with any penalty provided by this section, shall bear interest at the rate of 10% per annum from the time the tax should have been paid until it is paid. Any interest and penalty shall be added to the tax and be collected as part thereof.
(Prior Code, § 204.10)