Magnuson Act most commonly refers to the following legislation named after Warren Magnuson:

• Chinese Exclusion Repeal Act, a 1943 United States federal law that repealed the Chinese Exclusion Act
• Magnuson Act of 1950 (46 U.S.C.   § 70051), a United States federal law that amended the Espionage Act
• Magnuson-Moss Warranty Act, a 1975 United States federal law governing consumer warranties
• Magnuson–Stevens Fishery Conservation and Management Act, a 1976 United States federal law governing fisheries

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