19 CFR § 12.124 - Time limitations and extensions.
(a) Time limitations. The importer of a shipment of a covered commodity which has been detained under § 12.122 must bring the shipment into compliance with TSCA or export the shipment from the customs territory of the United States within 90 days after notice of detention or 30 days of demand for redelivery, whichever comes first.
(b) Time extensions. The port director, upon notification by the Administrator, may grant an extension of not more than 30 days if, due to delays caused by the Environmental Protection Agency or the CBP:
(1) The importer is unable, for good cause shown, to bring a shipment into compliance with the Act within the required time period; or
(2) The importer is unable to export the shipment from the customs territory of the United States within the required time period.