The Secretary may permit a non-Federal interest to carry out, for an authorized navigation project (or a separable element of an authorized navigation project), such maintenance activities as are necessary to ensure that the project is maintained to not less than the minimum project dimensions.
Except as provided in this section and subject to the availability of appropriations, the costs incurred by a non-Federal interest in performing the maintenance activities described in subsection (a) shall be eligible for reimbursement, not to exceed an amount that is equal to the estimated Federal cost for the performance of the maintenance activities, with any reimbursement subject to the non-Federal interest complying with all Federal laws and regulations that would apply to such maintenance activities if carried out by the Secretary.
The authority of the Secretary under this section terminates on the date that is 10 years after December 16, 2016.