; development The Administrator of the National Highway Traffic Safety Administration (referred to in this section as the Administrator ) shall— (1) carry out a study of the impact of driving under the influence of tetrahydrocannabinol on highway safety; and (2) develop enhanced strategies and procedures to reliably determine the impairment of a driver under the influence of tetrahydrocannabinol. (b) Authorization of appropriations There is authorized to be appropriated to the Administrator to carry out this section $50,000,000 for each of fiscal years 2019 through 2023. 5. Public health research (a) In general The Secretary of Health and Human Services, in consultation with the Director of the National Institutes of Health and the Commissioner of Food and Drugs, shall conduct research on the impacts of marijuana, including— (1) effects of tetrahydrocannabinol on the human brain; (2) efficacy of medicinal marijuana as a treatment for specific diseases and conditions; and (3) identification of additional medical benefits and uses of cannabis. (b) Authorization of appropriations There are authorized to be appropriated to the Secretary of Health and Human Services, $100,000,000 for each of fiscal years 2019 through 2023, for purposes of carrying out the activities described in subsection (a). 6. Protect kids The Alcohol and Tobacco Tax and Trade Bureau of the Department of the Treasury shall promulgate regulations that— (1) require restrictions on the advertising and promotion of products related to marijuana, if the Secretary determines that such regulation would be appropriate for the protection of the public health, taking into account— (A) the risks and benefits to the population of individuals age 18 and under, including users and nonusers of marijuana products; (B) the increased or decreased likelihood that existing users of marijuana products who are age 18 and under will stop using such products