Section 1770.3 - Index of records(a) Each borrower shall maintain a master index of records. The master index shall identify the records retained, the related retention period, and the locations where the records are maintained. The master index shall be subject to review by RUS and RUS shall reserve the right to add records, or lengthen retention periods upon finding that retention periods may be insufficient for its purposes.(b) At each office where records are kept or stored the borrower shall arrange, file, and index the records currently at that site so that they may be readily identified and made available to representatives of RUS.