; (B) an explanation of budgetary expenditures for covered State housing programs during the most recent fiscal year and a proposed budget for those programs for the subsequent fiscal year; and (C) the total number of low-income participants served by covered State housing programs and the average monthly enrollment in those programs during the most recent fiscal year. 406. Research (a) Study (1) In general The Comptroller General of the United States shall conduct a study of the different approaches and best practices used by States in carrying out this title. (2) Scope The material studied under paragraph (1) shall be limited to the information provided by States in the reports made available under section 405(b). (b) Report Not later than October 1 of the fourth fiscal year beginning after the date of enactment of this Act, the Comptroller General shall submit a report containing the results of the study conducted under subsection (a) to— (1) the Committee on Banking, Housing, and Urban Affairs of the Senate; (2) the Committee on the Budget of the Senate; (3) the Committee on Financial Services of the House of Representatives