((a)) ** In general** Not later than , the Secretary of the Interior, acting through the Director of the United States Geological Survey, shall—
((1)) complete a comprehensive nationwide geothermal resource assessment that examines the full range of geothermal resources in the United States; and
((2)) submit to the the Committee on Natural Resources of the House of Representatives and the Committee on Energy and Natural Resources of the Senate a report describing the results of the assessment.
((b)) ** Periodic updates** At least once every 10 years, the Secretary shall update the national assessment required under this section to support public and private sector decisionmaking.
((c)) ** Authorization of appropriations** There are authorized to be appropriated to the Secretary of the Interior to carry out this section—
((1)) $15,000,000 for each of fiscal years 2008 through 2012; and
((2)) such sums as are necessary for each of fiscal years 2013 through 2022.