Here's a quick rundown of what the new rules say (and what they don't):
It bans sales to kids Children under 18 can no longer buy e-cigarettes, cigars or other tobacco products. The FDA says it plans to enforce this rule just as it enforces bans on cigarettes to minors, with undercover visits and fines.
It forces makers to submit products for review Any product that came onto the market after 2007 must be FDA-approved. The FDA approval won't necessarily mean a product is safe, but the process is designed to ensure the product is either safe or equivalent to something else that was already on the market.
Sellers and manufacturers must prove their claims Without regulation, makers and sellers of e-cigarettes, cigars and hookahs were free to make any claims they wanted about their product, and often did—claiming they were safer that traditional tobacco products, for instance. The new rules let FDA decide if these claims are true.
Products will have to carry health warnings They will have to carry a label saying: "WARNING: This product contains nicotine. Nicotine is an addictive chemical." They'll also have to specifically warn pregnant women of the dangers to a developing fetus.
What the rules do not do:They don't ban e-cigarettes The FDA does not have the authority to ban tobacco-based products. Any product on the market before 2007 is exempt from the rule. What FDA can do, however, is decide if new inventions can be marketed.
They don't ban candy and other flavorings Advocates say flavored vaping products and cigars have lured kids into trying them, and the FDA agrees. But it's put off for now the question of whether to regulate these flavors. FDA signaled strongly its first target will be flavored cigars.
They don't ban ads The new rules do not prevent advertising of products, not even on television.