The rights of states to legalize marijuana under the Tenth Amendment: "The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people."
A federal law for cannabis that is similar to the Family Smoking Prevention and Tobacco Control Act. The Tobacco Control Act gave the U.S. Food and Drug Administration (FDA) authority to regulate the manufacture, distribution, and marketing of tobacco products. The law restricts tobacco marketing and sales to youth (which includes vending machine sales except in adult-only facilities, tobacco-brand sponsorships of sports and entertainment events or other social or cultural events, and free giveaways of sample cigarettes and brand-name non-tobacco promotional items); requires smokeless tobacco product warning labels; ensures “modified risk” claims are supported by scientific evidence; and requires disclosure of ingredients in tobacco products.
The law also requires tobacco company owners and operators to register annually and open their manufacturing and processing facilities to be subject to inspection by the FDA every two years; allows the FDA to implement standards for tobacco products to protect public health (for example, the FDA has the authority to regulate nicotine and ingredient levels); bans cigarettes with characterizing flavors, except menthol and tobacco; and funds FDA regulation of tobacco products through a user fee on the manufacturers of certain tobacco products sold in the United States, based on their U.S. market share.
A minimum age of no younger than 25. This is super important — see facts below.