(a) A record custodian may demand prepayment of the fees established by this article whenever he or she believes this to be in the best interest of the city. The prepayment amount shall be an estimate of the inspection and/or copying charges accrued in fulfilling the record request. Any overage or underage in the prepayment shall be settled prior to inspection of the requested record or delivery of the requested copies.
(b) Prepayment of inspection and/or copying fees shall be required whenever, in the best estimate of the record custodian, such fees are estimated to exceed $25.
(c) Where prepayment has been demanded by the record custodian, no record shall be made available to the requester until such prepayment has been made.