Authorization of appropriations

(a) General There are authorized to be appropriated such sums as may be necessary for the Secretary to provide technical assistance, interpretation, planning, marketing, cooperative agreement administration, education, and signage in furtherance of this Act. (b) Expenditures Except for costs associated with the establishment and operations of the Partnership, interim planning, and development of the Plan, expenditures shall be consistent with the approved Plan. (c) Land acquisition by condemnation Funds appropriated pursuant to this Act may not be used for the acquisition of land or any interest in land by condemnation. (d) Limitation on Federal ownership Nothing in this Act shall be construed to require or authorize the acquisition of land or interests in land except from willing sellers through donation, purchase with donated funds, exchange, or transfer from another Federal agency, consistent with section 4.