<Tr> <Td> </Td> <Td> This article is incomplete . Please help to improve it, or discuss the issue on the talk page . (April 2012) </Td> </Tr> <P> The history of warning labels in the United States began in 1938 when the United States Congress passed a law mandating that food products have a list of ingredients on the label . </P> <P> In 1966 the Federal government mandated that cigarette packs have a warning on them from the surgeon general . See Tobacco packaging warning messages . Congress voted in 1973 that products containing "toxic substances" must have labels . In 1985 there was a testimony that wanted record companies to put labels on music that contained sexual or violent lyrics . On March 29, 1990 warning labels were put on music products that contained potentially offensive lyrics; this was done with the agreement of the recording companies . In 1989, alcohol was required to have their surgeon general's warning . </P> <P> Several federal agencies are involved in the business of warning - labels, including the Consumer Product Safety Commission, the Food and Drug Administration, and the Federal Bureau of Investigation . FBI warning labels have been appeared since 1975 in rented movies warning people about video piracy . </P>

When did tobacco companies start putting warning labels on cigarettes