The area within the boundaries depicted on the map referred to in section
698 of this title shall be known as the Big Thicket National Preserve. Such lands shall be administered by the Secretary as a unit of the National Park System in a manner which will assure their natural and ecological integrity in perpetuity in accordance with the provisions of sections
698 to
698e of this title and with the provisions of sections
1,
2,
3, and
4 of this title, as amended and supplemented.