To prohibit the Secretary of Defense from making American communities non-competitive by using shipping cost differentials attributable to the application of the Merchant Marine Act, 1920.

Prohibits the Secretary of Defense, when making cost or business comparisons between U.S. and foreign bases for the supply of U.S. Navy activities, from using shipping cost differentials that are attributable to the application of the Merchant Marine Act, 1920 to the United States bases.