49 CFR 80.19: Reporting requirements.

At a minimum, any recipient of Federal credit assistance under this part shall submit an annual project performance report and audited financial statements to the DOT within no more than 180 days following the recipient's fiscal year-end for each year during which the recipient's obligation to the Federal Government remains in effect. The DOT may conduct periodic financial and compliance audits of the recipient of credit assistance, as determined necessary by the DOT. The specific credit agreement between the recipient of credit assistance and the DOT may contain additional reporting requirements.