49 C.F.R. § 630.8 Questionable data items.
Title 49 - Transportation
The FTA may enter a zero or adjust any questionable data item(s) in a reporting agency's section 15 report used in computing the section 9 apportionment. These adjustments may be made if any data appear inaccurate or have not been collected and reported in accordance with the FTA's definitions and/or confidence and precision levels, or if there is lack of adequate documentation or a reliable recordkeeping system.
Title 49: Transportation
PART 630—UNIFORM SYSTEM OF ACCOUNTS AND RECORDS AND REPORTING SYSTEM
§ 630.8 Questionable data items.