1. Required warnings for cigarette packages and advertisements: small entity compliance guide (revised) Publication: Silver Spring, MD : Center for Tobacco Products, July 2021 Subject(s): Cigarette Smoking -- adverse effectsCigarette Smoking -- prevention & controlProduct PackagingTobacco Products -- adverse effectsTobacco Products -- supply & distributionUnited StatesUnited States. Department of Health and Human Services.United States. Food and Drug Administration.