; and (2) if the Secretary concerned determines that the amount of the financial assurance is not adequate, adjust the amount of the financial assurance in accordance with this section. (d) Reduction (1) In general The Secretary concerned may reduce the amount of the financial assurance required if the Secretary concerned determines that a portion of the reclamation is completed in accordance with section 306. (2) Notice Before reducing or releasing the amount of financial assurance pursuant to this subsection, the Secretary concerned shall provide public notice and a reasonable opportunity for public notice and comment in accordance with subsection (g). (e) Incremental financial assurance (1) In general The Secretary concerned may authorize amounts of financial assurance for incremental mineral activities if— (A) no mineral activities are allowed beyond the activities for which financial assurance is provided; (B) the financial assurance for an increment covers all reclamation costs within the permit area for the increment; and (C) the amount and terms of the financial assurance for each increment are reviewed annually. (2) Review Notwithstanding subsection (c), the Secretary concerned shall— (A) review at least on an annual basis the amount and terms of the financial assurance for any increment