If you look at page 7 of the bill, you'll see the product categories that are targeted are cigarettes, little cigars, and blunt wraps. All the prohibited additives that are listed in column 1, such as flavourings, amino acids, caffeine, colouring agents, vitamins, mineral nutrients, and so forth, all apply to the same three categories.
On June 9th, 2009. See this statement in context.