sentences:  An additional requirement of the Controlled Substances Act was the establishment of a federal commission (formally titled the National Commission on Marihuana and Drug Abuse) to study the effects of cannabis use.President Nixon appointed nine of the commission's 13 members, including former Pennsylvania governor Raymond P. Shafer who was designated to serve as chairman.Nixon conveyed to Shafer his strong opposition to the legalization of cannabis, and he advised Shafer to "keep your commission in line" months before the initial report was issued.