Fee schedule. Imposition of late fee or delinquency charge

(a) A mortgage servicer shall maintain and keep current a schedule of fees that it charges mortgagors for its servicing-related activities. The schedule shall identify each fee, provide a plain English explanation of the fee and state the amount of the fee or range of amounts or, if there is no standard fee, how the fee is calculated or determined. A mortgage servicer shall make its schedule available to the mortgagor or the mortgagor's authorized representative upon request. (b) A mortgage servicer shall not impose any late fee or delinquency charge when the only delinquency is attributable to late fees or delinquency charges assessed on an earlier payment, and the payment is otherwise a full payment for the applicable period and is paid on its due date or within any applicable grace period. Late charges shall not be (1) based on an amount greater than the past due amount; (2) collected from the escrow account or from escrow surplus without the approval of the mortgagor; or (3) deducted from any regular payment.