Amendments en bloc: 1) placed restrictions on awarding contracts under this Act to persons or entities domiciled or operating under the laws of a foreign government; 2) prohibited the fraudulent use of "Made in America" labels; and 3) required the Secretary of the Interior to award contracts to domestic firms, which under competitive procedures would be awarded to foreign firms, when the final product of the domestic firm would be completely assembled in the United States with 51% of the final product produced domestically, and not more than a six percent difference existed between the foreign and domestic firm bids.