; (2) have a maximum Federal cost of $3,000,000; and (3) ensure that personnel from the local project area, region, and headquarters levels of the Bureau of Reclamation or the Bureau of Indian Affairs concurrently conduct the review required under that section. (b) Extension If the Secretary determines that a project study described in subsection (a) will not be conducted in accordance with subsection (a), the Secretary, not later than 30 days after the date of making the determination, shall— (1) prepare an updated project study schedule and cost estimate; (2) notify the non-Federal project cost-sharing partner that the project study has been delayed; and (3) provide written notice to the Committee on Natural Resources of the House of Representatives and the Committee on Energy and Natural Resources of the Senate as to the reasons the requirements of subsection (a) are not attainable. (c) Exception (1) In general Notwithstanding the requirements of subsection (a), the Secretary may extend the timeline of a project study by a period not to exceed 3 years, if the Secretary determines that the project study is too complex to comply with the requirements of subsection (a). (2) Factors In making a determination that a study is too complex to comply with the requirements of subsection (a), the Secretary shall consider— (A) the type, size, location, scope, and overall cost of the project; (B) whether the project will use any innovative design or construction techniques; (C) whether the project will require significant action by other Federal, State, or local agencies; (D) whether there is significant public dispute as to the nature or effects of the project