16 U.S.C. § 1058 — Limitation on appropriations and expenditures; charges for visitation and use

Funds appropriated and expended under this provision for construction of the buildings for the National Fisheries Center and Aquarium must not exceed $10,000,000: On the condition that , That the expenditure of such funds must be made under the condition that the Secretary of the Interior must establish charges relating to visitation to and uses of the National Fisheries Center and Aquarium at such rates as in the Secretary’s judgment will produce revenues to

(a) liquidate the costs of construction within a period of not to exceed thirty years and

(b) pay for the annual operation and maintenance costs of it.