; less (II) the total number of drug overdose deaths or non-fatal drug overdoses that are within areas in such State or territory that are eligible counties under section 3401. (vi) Study Not later than 3 years after the date of enactment of this title, the Comptroller General shall conduct a study to determine whether the data utilized for purposes of clause (ii) provides the most precise measure of State need related to substance use and addiction prevalence and whether additional data would provide more precise measures the levels of substance use and addiction prevalent in States. Such study shall identify barriers to collecting or analyzing such data, and make recommendations for revising the distribution factors used under such clause to determine funding levels in order to direct funds to the States in most need of funding to provide substance use disorder treatment services. (2) Supplemental grants (A) In general Subject to subparagraph (C), the Secretary shall disburse the remainder of amounts not disbursed under paragraph (1) for such fiscal year for the purpose of making grants to States whose application— (i) contains a report concerning the dissemination of emergency relief funds under paragraph (1) and the plan for utilization of such funds; (ii) demonstrates the need in such State, on an objective and quantified basis, for supplemental financial assistance to combat substance use disorder; (iii) demonstrates the existing commitment of local resources of the State, both financial and in-kind, to combating substance use disorder; (iv) demonstrates the ability of the State to utilize such supplemental financial resources in a manner that is immediately responsive and cost effective; (v) demonstrates that resources will be allocated in accordance with the local demographic incidence of substances use disorders and drug overdose mortality