927.20 GROSS AMOUNT FOR DELINQUENCY.
   (a)   The charges shall constitute the net charges for storm water drainage service if paid by the 15th of the month for that billing date. If paid after the 15th of the month, the applicable charges shall be at the gross rate, which shall be 10% greater than the net charges.
 
   (b)   It shall be understood that the U.S. Government postmark shall govern the due date and that when any payments are mailed within the 15-day period or paid at an authorized collection agency within the 15-day period, they shall be considered as paid within the prescribed time lit and exempt from penalty. In the collection of such payments by mail, the U.S. Government postmark on the envelope containing the payment shall be identified and retained for a period of four months after which they will be destroyed and the gross amount of such bill shall not be disputed.
(Ord. 01-24. Passed 3-13-01.)