mnli premise: The analysis in the final rule has been revised based on comments the FDA received and now also considers the costs and benefits associated with a rule issued by the Substance Abuse and Mental Health Services Administration (SAMHSA) on January 19, 1996, governing a program of State-operated enforcement activities to restrict the sale or distribution of tobacco products to individuals under the age of 18. hypothesis: The FDA wanted revisions in the final ruling to reflect the changes in the reporting of the costs entailed in enforcing tobacco product sales restrictions to minors. 