; (6) in 1998, the Secretary of the Interior responded to the directive from Congress described in paragraph (5) by submitting to Congress a report entitled Hazardous Substance Contamination of Alaska Native Claims Settlement Act Lands in Alaska , the findings of which Congress recognizes, including that the United States conveyed numerous contaminated lands to Alaska Native Corporations pursuant to the Alaska Native Claims Settlement Act ( 43 U.S.C. 1601 et seq. ) for the settlement of aboriginal land claims; (7) in 2014, in the joint explanatory statement for the Department of the Interior, Environment, and Related Agencies accompanying the Consolidated and Further Continuing Appropriations Act, 2015 ( Public Law 113–235 ; 128 Stat. 2130), Congress directed the Secretary of the Interior— (A) to provide an update on the inventory of contaminated sites conveyed pursuant to the Alaska Native Claims Settlement Act ( 43 U.S.C. 1601 et seq. ), including sites identified subsequent to the 1998 report described in paragraph (6); (B) to provide an updated status on the 6 duties listed in the 1998 report described in paragraph (6); and (C) to provide a detailed plan on how the Department of the Interior intended to complete a cleanup of each contaminated site conveyed pursuant to the Alaska Native Claims Settlement Act ( 43 U.S.C. 1601 et seq. ); (8) in 2016, the Secretary of the Interior updated the report described in paragraph (6), the updated findings of which Congress recognizes, including that 920 contaminated land sites were conveyed to Alaska Native Corporations pursuant to the Alaska Native Claims Settlement Act ( 43 U.S.C. 1601 et seq. ); (9) the full number of currently contaminated lands that were contaminated at the time of conveyance pursuant to the Alaska Native Claims Settlement Act ( 43 U.S.C. 1601 et seq. ) is unknown