In order for the Secretary to enter into a watershed restoration and enhancement agreement
(1) the agreement shall
(A) include such terms and conditions mutually agreed to by the Secretary and the landowner;
(B) improve the viability of and otherwise benefit the fish, wildlife, and other biotic resources on public land in the watershed;
(C) authorize the provision of technical assistance by the Secretary in the planning of management activities that will further the purposes of the agreement;
(D) provide for the sharing of costs of implementing the agreement among the Federal government, the landowner, and other entities, as mutually agreed on by the affected interests; and
(E) ensure that any expenditure by the Secretary pursuant to the agreement is determined by the Secretary to be in the public interest; and