tribe to manage wildlife to meet the requirements of this Act. (7) Individual exception For purposes of this subsection, any sea lion located between Columbia River river mile 112 and the Bonneville Dam, or in any tributary to the Columbia River with a confluence below the Bonneville Dam that includes spawning habitat of threatened or endangered salmon or steelhead is deemed to be individually identifiable. (8) Significant negative impact exception For purposes of this subsection, any sea lion located between Columbia River river mile 112 and the Bonneville Dam, or in any tributary to the Columbia River with a confluence below Bonneville Dam that includes spawning habitat of threatened or endangered salmon or steelhead is deemed to be having a significant negative impact on the decline or recovery of salmonid fishery stocks described in subsection (b)(1). (9) Definition In this subsection, the term Indian tribe has the meaning given such term in section 4 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 5304 ). . 4. Treaty rights of federally recognized indian tribes Nothing in this Act or the amendments made by this Act shall be construed to enlarge, affect, or modify any treaty or other right of an Indian tribe (as defined in section 4 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 5304 )), except as expressly set forth in this Act or the amendments made by this Act. 5. Report Not later than 180 days after the date of enactment of this Act, the Secretary of the Interior shall study and report to Congress on the potential effects of the lethal taking of sea lions on the recovery of salmonid stocks in the waters of the Columbia River and the tributaries of the Columbia River.