The President shall designate in the National Contingency Plan published under section
9605 of this title the Federal officials who shall act on behalf of the public as trustees for natural resources under this chapter and section
1321 of title
33. Such officials shall assess damages for injury to, destruction of, or loss of natural resources for purposes of this chapter and such section
1321 of title
33 for those resources under their trusteeship and may, upon request of and reimbursement from a State and at the Federal officials’ discretion, assess damages for those natural resources under the State’s trusteeship.