; (E) in the case of individuals with an income greater than 300 percent of the official poverty level, the provider will not, for any calendar year, impose charges in an amount exceeding 15 percent of the annual gross income of the individual involved; and (F) in the case of eligible American Indian and Alaska Native individuals as defined by section 447.50 of title 42, Code of Federal Regulations (as in effect on July 1, 2010), the provider will not impose any charges for substance use disorder treatment services, including any charges or cost-sharing prohibited by section 1402(d) of the Patient Protection and Affordable Care Act. (2) Charges With respect to compliance with the assurances made under paragraph (1), a State may, in the case of individuals subject to a charge— (A) assess the amount of the charge in the discretion of the State, including imposing only a nominal charge for the provision of services, subject to the provisions of the paragraph regarding public schedules and regarding limitations on the maximum amount of charges