Sec. 12.
That all vessels may be reconditioned and kept in suitable repair and until sold shall be managed and operated by the board or chartered or leased by it on such terms and conditions as the board shall deem wise for the promotion and maintenance of an efficient merchant marine, pursuant to the policy and purposes declared in sections 1 and 5 of this Act; and the United States Shipping Board Emergency Fleet Corporation shall continue in existence and have authority to operate vessels, unless otherwise directed by law, until all vessels are sold in accordance with the provisions of this Act, the provision in section 11 of the "Shipping Act, 1916," to the contrary notwithstanding.