Federal lands, waters, and interests therein formerly within the boundary of Olympic National Forest which are included within the boundary of Olympic National Park pursuant to section 1 of this Act [16 U.S.C. 251n
] are, subject to valid existing rights, hereby transferred to the administrative jurisdiction of the Secretary of the Interior for administration as part of the park, and shall be subject to all the laws and regulations applicable to the park: Provided further
, That within section 15, township 24 north, range 9 west Willamette meridian, and within an area extending not more than one mile north of such section, nothing herein shall be construed to limit or otherwise modify the authority of the Secretary of Agriculture to design and construct a forest logging road east of the park boundary: Provided, however
, That the Secretary of Agriculture shall construct the road as close as practically possible to the park boundary but not more than five hundred feet east of the divide. Following construction, the Secretary of the Interior is hereby authorized and directed to redescribe and relocate the boundary of the park along the eastern clearing limits of the road.