Concessions for sponging privileges.
Section 42
SEC. 42. Concessions for sponging privileges.—Concessions granted in accordance with this article shall be for the sponging privileges exclusively, shall run for a period of not to exceed twenty years, and shall not interfere with the free passage over the area under concession of boats or vessels, nor in any way prevent the unrestricted fishing, by other persons over the said area, for marine forms other than sponges: Provided, however, That, subject to confirmation by the Secretary of Agriculture and Natural Resources, the official or chief of the bureau, office or service designated to carry out the provisions of this Act, may select from any concession, without charge, adequate areas of foreshore and waters for the cultivation of sponges or other marine forms for the purpose of any Government experiment station or school located on or adjacent to any concession.