; and (2) by adding at the end the following: (c) Commerce The Secretary of Commerce may waive this subchapter with respect to contracts for the construction, alteration, or repair of vessels, regardless of the terms of the contracts as to payment or title, when the contract is made under the Act entitled An Act to define the functions and duties of the Coast and Geodetic Survey, and for other purposes , approved August 6, 1947 ( 33 U.S.C. 883a et seq.). .