In 2002, Siebert wrote a letter to the United States Congress in which he objected to bill H.R. 5607 introduced by Rep. Joe Baca (D-California) which sought to place Salvia divinorum in Schedule I of the Controlled Substances Act.
The bill does not mention the active chemical constituent salvinorin A. Salvia expert Daniel Siebert criticised this wording as being
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