45 CFR § 670.14
Conditions of permits
April 14, 2021
(a) Possession of permits. Permits issued under the regulations in this part, or copies of them, must be in the possession of persons to whom they are issued and their agents when conducting the authorized action.
(b) Display of permits. Any permit issued shall be displayed for inspection upon request to the Director, designated agents of the Director, or any person with enforcement responsibilities.
(c) Filing of reports. Permit holders are required to file reports of the activities conducted under a permit. Reports shall be submitted to the Director not later than June 30 for the preceding 12 months.