Any charges disputed by customers must be presented to the District, in writing, on or before the date of discontinuance of Service for non-payment. The General Manager, or his or her designee, in his or her discretion, may investigate the disputed charges and may, in his or her discretion, delay the discontinuance of Service until such time as he or she completes investigation of the disputed charge. [Ord. 2014-1 § 7, 2014.]