; and (ii) that the city or county or group of counties has the capacity to administer the funding received under this subtitle. (D) Minimum funding A city or county that meets the requirement of this paragraph and receives a grant under section 3401 shall be entitled to an amount of funding under the grant in an amount that is not less than the amount determined under section 3403(a) with respect to such city or county. (4) Independent city Independent cities that are not located within the territory of a county shall be treated as eligible counties for purposes of this subtitle. (5) Political subdivisions With respect to States that do not have a local county system of governance, the Secretary shall determine the local political subdivisions within such States that are eligible to receive a grant under section 3401 and such subdivisions shall be treated as eligible counties for purposes of this subtitle. (6) Determinations where there is a lack of data The Secretary shall establish eligibility and allocation criteria related to the prevalence of drug overdose deaths, the mortality rate from drug overdoses, and that provides an equivalent measure of need for funding for cities and counties for which the data described in paragraph (1)(A) or (2)(D)(i) is not available. (7) 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 paragraph (1)(A) provides the most precise measure of local area need related to substance use and addiction prevalence and whether additional data would provide more precise measures of substance use and addiction prevalence in local areas. Such study shall identify barriers to collecting or analyzing such data, and make recommendations for revising the indicators used under such paragraph to determine eligibility in order to direct funds to the local areas in most need of funding to provide assistance related to substance use and addiction. (8) Reference For purposes of