The director of administration/clerk shall collect the sum of $10.00 for researching and/or reporting property assessment information. The fee shall apply to each and every piece of property researched. The director of administration/clerk may collect the fee or sum of fees at the time of request or may bill, by invoice, the requesting person or company. An invoice becomes delinquent if not collected within 20 days of the mailing date. Delinquent invoices shall be assessed a penalty of one percent per month on the principal amount. (Ord. 414 § 1, 1982).