There are hereby authorized to be appropriated such sums as may be necessary to carry out the purposes of sections 459g to 459g-7 of this title, not to exceed $13,903,000 for acquisition of lands and interests therein, of which no more than $1,000,000 may be expended for acquisition of lands owned by Core Banks Club Properties, Incorporated. For development of essential public facilities there are authorized to be appropriated not more than $2,935,000. On or before January 1, 1978, the Secretary shall develop and transmit to the Committees on Interior and Insular Affairs of the United States Congress a final master plan for the full development of the seashore consistent with the preservation objectives of sections 459g to 459g-7 of this title, indicating—

(1) the facilities needed to accommodate the health, safety and recreation needs of the visiting public;

(2) the location and estimated cost of all facilities; and

(3) the projected need for any additional facilities within the seashore.