Before revision: The amendment established the designation of " generally recognized as safe" , which refers to chemicals or substances which can be used as food additives without further evaluation or testing just because they have been long used and there is broad acceptance of their use .
After revision: The amendment established an exemption from the " generally recognized as safe" by scientific experts in the field, based on long history of used before 1958 or based on scientific studiesfood additive" definition and requirements for substances " .