; (B) the differential cost to the program between each distribution model for medication assisted treatment; and (C) provider willingness to provide or prescribe substance use disorder treatment medications. (b) Report Not later than 15 months after the date of the enactment of this Act, the Comptroller General shall submit to Congress a report containing the results of the study conducted under subsection (a), together with recommendations for such legislation and administrative action as the Comptroller General determines appropriate.