(a) Within the park the Secretary is authorized to acquire lands, waters, and interests therein by donation, purchase with donated or appropriated funds, or exchange. Any lands or interests therein owned by the State of South Carolina or any political subdivision thereof may be acquired only by donation.

(b) With respect to any lands acquired under the provisions of this subchapter which at the time of acquisition are leased for hunting purposes, such acquisition shall permit the continued exercise of such lease in accordance with its provisions for its unexpired term, or for a period of five years, whichever is less: Provided, That no provision of such lease may be exercised which, in the opinion of the Secretary, is incompatible with the preservation objectives of this subchapter, or which is inconsistent with applicable Federal and State game laws, whichever is more restrictive.