((a)) ** Mineral rights; easements; improved properties** The Secretary shall, immediately after the publication of the boundaries of the preserve, commence negotiations for the acquisition of the lands located therein: , That he shall not acquire the mineral estate in any property or existing easements for public utilities, pipelines or railroads without the consent of the owner unless, in his judgment, he first determines that such property or estate is subject to, or threatened with, uses which are, or would be, detrimental to the purposes and objectives of sections 698 to 698e of this title: , That the Secretary, insofar as is reasonably possible, may avoid the acquisition of improved properties, as defined in sections 698 to 698e of this title, and shall make every effort to minimize the acquisition of land where he finds it necessary to acquire properties containing improvements.ProvidedProvided further
((b)) ** Plan to Congressional committees; time; contents** Within one year after , the Secretary shall submit, in writing, to the Committee on Interior and Insular Affairs and to the Committees on Appropriations of the United States Congress a detailed plan which shall indicate:
((i)) the lands and areas which he deems essential to the protection and public enjoyment of this preserve,
((ii)) the lands which he has previously acquired by purchase, donation, exchange or transfer for administration for the purpose of this preserve, and
((iii)) the annual acquisition program (including the level of funding) which he recommends for the ensuing five fiscal years.
((c)) ** Completion of land acquisition program; time** It is the express intent of the Congress that the Secretary should substantially complete the land acquisition program contemplated by sections 698 to 698e of this title within six years after .October 11, 19741974-10-11